Hi.

I gave up on ALSA for my Raspberry Pi's audio output and modified some test code to use its I2S without creating a sound device. I'd like to send Csound output through a named pipe to this driver, and have Csound block when the named pipe is full (I will probably reduce its maximum size).

Csound doesn't stay open if I have a filename as -o output. I also don't expect to be able to use -o dac because the system currently has no registered audio devices and I was hoping to avoid having that extra bloat.

Any other way to keep Csound open and blocking, or must I create a dummy audio device, and use fout to send the actual audio?

Thanks!

-Chuckk

--

http://www.badmuthahubbard.com

Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here

Surely the problem is that without -o DAC time will race away
==John

Surely the problem is that without -o DAC time will race away
==John

On 6 Jun 2016, at 16:38, Victor Lazzarini <Victor.Lazzarini@NUIM.IE> wrote:

f0 360000 ?

Victor Lazzarini

Dean of Arts, Celtic Studies, and Philosophy

Maynooth University

Ireland

On 6 Jun 2016, at 13:36, Chuckk Hubbard < badmuthahubbard@GMAIL.COM> wrote:

Hi.

I gave up on ALSA for my Raspberry Pi's audio output and modified some test code to use its I2S without creating a sound device. I'd like to send Csound output through a named pipe to this driver, and have Csound block when the named pipe is full (I will probably reduce its maximum size).

Csound doesn't stay open if I have a filename as -o output. I also don't expect to be able to use -o dac because the system currently has no registered audio devices and I was hoping to avoid having that extra bloat.

Any other way to keep Csound open and blocking, or must I create a dummy audio device, and use fout to send the actual audio?

Thanks!

-Chuckk

--

http://www.badmuthahubbard.com

Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here

Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here

Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here

did you add -o dac?
========================
Dr Victor Lazzarini
Dean of Arts, Celtic Studies and Philosophy,
Maynooth University,
Maynooth, Co Kildare, Ireland
Tel: 00 353 7086936
Fax: 00 353 1 7086952 

> On 7 Jun 2016, at 11:34, Chuckk Hubbard  wrote:
> 
> So, -+rtaudio=null doesn't do the trick, either. Even with the named pipe reduced to 8 bytes and the notes and f0 extended to 200 seconds, Csound doesn't wait.
> It could be that the program I'm using for RPi I2S is writing over what's in its transmit FIFO instead of adding to it, so it never registers as full, or it could be that Csound just won't stay open without -odac...?
> -Chuckk
> 
> 
> On Mon, Jun 6, 2016 at 9:18 PM, Victor Lazzarini  wrote:
> One can use -+rtaudio=null which should emulate the timing of an audio card without connecting to one.
> 
> Victor Lazzarini
> Dean of Arts, Celtic Studies, and Philosophy
> Maynooth University
> Ireland
> 
> On 6 Jun 2016, at 17:03, John  wrote:
> 
>> Surely the problem is that without -o DAC time will race away 
>> ==John
>> 
>> On 6 Jun 2016, at 16:38, Victor Lazzarini  wrote:
>> f0 360000 ? 
>> 
>> Victor Lazzarini
>> Dean of Arts, Celtic Studies, and Philosophy
>> Maynooth University
>> Ireland
>> 
>> On 6 Jun 2016, at 13:36, Chuckk Hubbard < badmuthahubbard@GMAIL.COM> wrote: 
>> 
>>> Hi.
>>> 
>>> I gave up on ALSA for my Raspberry Pi's audio output and modified some test code to use its I2S without creating a sound device. I'd like to send Csound output through a named pipe to this driver, and have Csound block when the named pipe is full (I will probably reduce its maximum size).
>>> Csound doesn't stay open if I have a filename as -o output. I also don't expect to be able to use -o dac because the system currently has no registered audio devices and I was hoping to avoid having that extra bloat.
>>> 
>>> Any other way to keep Csound open and blocking, or must I create a dummy audio device, and use fout to send the actual audio? 
>>> Thanks!
>>> -Chuckk
>>> 
>>> -- 
>>> http://www.badmuthahubbard.com
>>> Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here
>> Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here
>> Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here
> Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here
> 
> 
> 
> -- 
> http://www.badmuthahubbard.com
> Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here

Csound mailing list
Csound@listserv.heanet.ie
https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
Send bugs reports to
        https://github.com/csound/csound/issues
Discussions of bugs and features can be posted here

If you are using the API, it becomes much easier. All you need is to collect the samples from Csound and
put in your open named pipe. Csound will not run away because you can control how often it calls the
performKsmps() function.

If you are not using the API, there is another alternative. You could try to use sockets, as Csound has UDP
and TCP opcodes that you could use to write audio to a destination. 

regards
========================
Dr Victor Lazzarini
Dean of Arts, Celtic Studies and Philosophy,
Maynooth University,
Maynooth, Co Kildare, Ireland
Tel: 00 353 7086936
Fax: 00 353 1 7086952 

> On 7 Jun 2016, at 11:58, Chuckk Hubbard  wrote:
> 
> Using -odac, monitor and fout, unfortunately, Csound does not block when the pipe written to by fout is full; it tells me "Csound ignoring SIGPIPE: Broken pipe". Maybe this is ultimately good, if I prefer to drop samples than to increase latency.
> I was hoping to avoid writing a separate program with the API, but I believe it would be trivial to do this that way, no? A C program should block on a full FIFO by default.
> Back to work...
> -Chuckk
> 
> On Tue, Jun 7, 2016 at 1:37 PM, Chuckk Hubbard  wrote:
> Yes, after reading your question. It stays open, even though the system has no audio devices. Next stop: fout...
> 
> On Tue, Jun 7, 2016 at 1:36 PM, Victor Lazzarini  wrote:
> did you add -o dac?
> ========================
> Dr Victor Lazzarini
> Dean of Arts, Celtic Studies and Philosophy,
> Maynooth University,
> Maynooth, Co Kildare, Ireland
> Tel: 00 353 7086936
> Fax: 00 353 1 7086952
> 
> > On 7 Jun 2016, at 11:34, Chuckk Hubbard  wrote:
> >
> > So, -+rtaudio=null doesn't do the trick, either. Even with the named pipe reduced to 8 bytes and the notes and f0 extended to 200 seconds, Csound doesn't wait.
> > It could be that the program I'm using for RPi I2S is writing over what's in its transmit FIFO instead of adding to it, so it never registers as full, or it could be that Csound just won't stay open without -odac...?
> > -Chuckk
> >
> >
> > On Mon, Jun 6, 2016 at 9:18 PM, Victor Lazzarini  wrote:
> > One can use -+rtaudio=null which should emulate the timing of an audio card without connecting to one.
> >
> > Victor Lazzarini
> > Dean of Arts, Celtic Studies, and Philosophy
> > Maynooth University
> > Ireland
> >
> > On 6 Jun 2016, at 17:03, John  wrote:
> >
> >> Surely the problem is that without -o DAC time will race away
> >> ==John
> >>
> >> On 6 Jun 2016, at 16:38, Victor Lazzarini  wrote:
> >> f0 360000 ?
> >>
> >> Victor Lazzarini
> >> Dean of Arts, Celtic Studies, and Philosophy
> >> Maynooth University
> >> Ireland
> >>
> >> On 6 Jun 2016, at 13:36, Chuckk Hubbard < badmuthahubbard@GMAIL.COM> wrote:
> >>
> >>> Hi.
> >>>
> >>> I gave up on ALSA for my Raspberry Pi's audio output and modified some test code to use its I2S without creating a sound device. I'd like to send Csound output through a named pipe to this driver, and have Csound block when the named pipe is full (I will probably reduce its maximum size).
> >>> Csound doesn't stay open if I have a filename as -o output. I also don't expect to be able to use -o dac because the system currently has no registered audio devices and I was hoping to avoid having that extra bloat.
> >>>
> >>> Any other way to keep Csound open and blocking, or must I create a dummy audio device, and use fout to send the actual audio?
> >>> Thanks!
> >>> -Chuckk
> >>>
> >>> --
> >>> http://www.badmuthahubbard.com
> >>> Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here
> >> Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here
> >> Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here
> > Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here
> >
> >
> >
> > --
> > http://www.badmuthahubbard.com
> > Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here
> 
> Csound mailing list
> Csound@listserv.heanet.ie
> https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
> Send bugs reports to
>         https://github.com/csound/csound/issues
> Discussions of bugs and features can be posted here
> 
> 
> 
> -- 
> http://www.badmuthahubbard.com
> 
> 
> 
> -- 
> http://www.badmuthahubbard.com
> Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here

Csound mailing list
Csound@listserv.heanet.ie
https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
Send bugs reports to
        https://github.com/csound/csound/issues
Discussions of bugs and features can be posted here

Interestingly I was able to make a pipe and run csound to it, in a blocking way, from one Csound instance to another (on OSX):

writer
$ csound  -W -o pipe oscili.csd

reader
$ csound -W -i pipe -o dac inout.csd

I would expect it to work on linux.
========================
Dr Victor Lazzarini
Dean of Arts, Celtic Studies and Philosophy,
Maynooth University,
Maynooth, Co Kildare, Ireland
Tel: 00 353 7086936
Fax: 00 353 1 7086952 

> On 7 Jun 2016, at 12:12, Victor Lazzarini  wrote:
> 
> If you are using the API, it becomes much easier. All you need is to collect the samples from Csound and
> put in your open named pipe. Csound will not run away because you can control how often it calls the
> performKsmps() function.
> 
> If you are not using the API, there is another alternative. You could try to use sockets, as Csound has UDP
> and TCP opcodes that you could use to write audio to a destination. 
> 
> regards
> ========================
> Dr Victor Lazzarini
> Dean of Arts, Celtic Studies and Philosophy,
> Maynooth University,
> Maynooth, Co Kildare, Ireland
> Tel: 00 353 7086936
> Fax: 00 353 1 7086952 
> 
>> On 7 Jun 2016, at 11:58, Chuckk Hubbard  wrote:
>> 
>> Using -odac, monitor and fout, unfortunately, Csound does not block when the pipe written to by fout is full; it tells me "Csound ignoring SIGPIPE: Broken pipe". Maybe this is ultimately good, if I prefer to drop samples than to increase latency.
>> I was hoping to avoid writing a separate program with the API, but I believe it would be trivial to do this that way, no? A C program should block on a full FIFO by default.
>> Back to work...
>> -Chuckk
>> 
>> On Tue, Jun 7, 2016 at 1:37 PM, Chuckk Hubbard  wrote:
>> Yes, after reading your question. It stays open, even though the system has no audio devices. Next stop: fout...
>> 
>> On Tue, Jun 7, 2016 at 1:36 PM, Victor Lazzarini  wrote:
>> did you add -o dac?
>> ========================
>> Dr Victor Lazzarini
>> Dean of Arts, Celtic Studies and Philosophy,
>> Maynooth University,
>> Maynooth, Co Kildare, Ireland
>> Tel: 00 353 7086936
>> Fax: 00 353 1 7086952
>> 
>>> On 7 Jun 2016, at 11:34, Chuckk Hubbard  wrote:
>>> 
>>> So, -+rtaudio=null doesn't do the trick, either. Even with the named pipe reduced to 8 bytes and the notes and f0 extended to 200 seconds, Csound doesn't wait.
>>> It could be that the program I'm using for RPi I2S is writing over what's in its transmit FIFO instead of adding to it, so it never registers as full, or it could be that Csound just won't stay open without -odac...?
>>> -Chuckk
>>> 
>>> 
>>> On Mon, Jun 6, 2016 at 9:18 PM, Victor Lazzarini  wrote:
>>> One can use -+rtaudio=null which should emulate the timing of an audio card without connecting to one.
>>> 
>>> Victor Lazzarini
>>> Dean of Arts, Celtic Studies, and Philosophy
>>> Maynooth University
>>> Ireland
>>> 
>>> On 6 Jun 2016, at 17:03, John  wrote:
>>> 
>>>> Surely the problem is that without -o DAC time will race away
>>>> ==John
>>>> 
>>>> On 6 Jun 2016, at 16:38, Victor Lazzarini  wrote:
>>>> f0 360000 ?
>>>> 
>>>> Victor Lazzarini
>>>> Dean of Arts, Celtic Studies, and Philosophy
>>>> Maynooth University
>>>> Ireland
>>>> 
>>>> On 6 Jun 2016, at 13:36, Chuckk Hubbard < badmuthahubbard@GMAIL.COM> wrote:
>>>> 
>>>>> Hi.
>>>>> 
>>>>> I gave up on ALSA for my Raspberry Pi's audio output and modified some test code to use its I2S without creating a sound device. I'd like to send Csound output through a named pipe to this driver, and have Csound block when the named pipe is full (I will probably reduce its maximum size).
>>>>> Csound doesn't stay open if I have a filename as -o output. I also don't expect to be able to use -o dac because the system currently has no registered audio devices and I was hoping to avoid having that extra bloat.
>>>>> 
>>>>> Any other way to keep Csound open and blocking, or must I create a dummy audio device, and use fout to send the actual audio?
>>>>> Thanks!
>>>>> -Chuckk
>>>>> 
>>>>> --
>>>>> http://www.badmuthahubbard.com
>>>>> Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here
>>>> Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here
>>>> Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here
>>> Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here
>>> 
>>> 
>>> 
>>> --
>>> http://www.badmuthahubbard.com
>>> Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here
>> 
>> Csound mailing list
>> Csound@listserv.heanet.ie
>> https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
>> Send bugs reports to
>>        https://github.com/csound/csound/issues
>> Discussions of bugs and features can be posted here
>> 
>> 
>> 
>> -- 
>> http://www.badmuthahubbard.com
>> 
>> 
>> 
>> -- 
>> http://www.badmuthahubbard.com
>> Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here
> 
> Csound mailing list
> Csound@listserv.heanet.ie
> https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
> Send bugs reports to
>        https://github.com/csound/csound/issues
> Discussions of bugs and features can be posted here

Csound mailing list
Csound@listserv.heanet.ie
https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
Send bugs reports to
        https://github.com/csound/csound/issues
Discussions of bugs and features can be posted here

Maybe it didn’t block actually. I can’t say for sure, but the writer process only starts writing once I start the reader,
then it races ahead. The reader needs to have a ctl-C sent to it to start outputting audio.
========================
Dr Victor Lazzarini
Dean of Arts, Celtic Studies and Philosophy,
Maynooth University,
Maynooth, Co Kildare, Ireland
Tel: 00 353 7086936
Fax: 00 353 1 7086952 

> On 7 Jun 2016, at 12:55, Victor Lazzarini  wrote:
> 
> Interestingly I was able to make a pipe and run csound to it, in a blocking way, from one Csound instance to another (on OSX):
> 
> writer
> $ csound  -W -o pipe oscili.csd
> 
> reader
> $ csound -W -i pipe -o dac inout.csd
> 
> I would expect it to work on linux.
> ========================
> Dr Victor Lazzarini
> Dean of Arts, Celtic Studies and Philosophy,
> Maynooth University,
> Maynooth, Co Kildare, Ireland
> Tel: 00 353 7086936
> Fax: 00 353 1 7086952 
> 
>> On 7 Jun 2016, at 12:12, Victor Lazzarini  wrote:
>> 
>> If you are using the API, it becomes much easier. All you need is to collect the samples from Csound and
>> put in your open named pipe. Csound will not run away because you can control how often it calls the
>> performKsmps() function.
>> 
>> If you are not using the API, there is another alternative. You could try to use sockets, as Csound has UDP
>> and TCP opcodes that you could use to write audio to a destination. 
>> 
>> regards
>> ========================
>> Dr Victor Lazzarini
>> Dean of Arts, Celtic Studies and Philosophy,
>> Maynooth University,
>> Maynooth, Co Kildare, Ireland
>> Tel: 00 353 7086936
>> Fax: 00 353 1 7086952 
>> 
>>> On 7 Jun 2016, at 11:58, Chuckk Hubbard  wrote:
>>> 
>>> Using -odac, monitor and fout, unfortunately, Csound does not block when the pipe written to by fout is full; it tells me "Csound ignoring SIGPIPE: Broken pipe". Maybe this is ultimately good, if I prefer to drop samples than to increase latency.
>>> I was hoping to avoid writing a separate program with the API, but I believe it would be trivial to do this that way, no? A C program should block on a full FIFO by default.
>>> Back to work...
>>> -Chuckk
>>> 
>>> On Tue, Jun 7, 2016 at 1:37 PM, Chuckk Hubbard  wrote:
>>> Yes, after reading your question. It stays open, even though the system has no audio devices. Next stop: fout...
>>> 
>>> On Tue, Jun 7, 2016 at 1:36 PM, Victor Lazzarini  wrote:
>>> did you add -o dac?
>>> ========================
>>> Dr Victor Lazzarini
>>> Dean of Arts, Celtic Studies and Philosophy,
>>> Maynooth University,
>>> Maynooth, Co Kildare, Ireland
>>> Tel: 00 353 7086936
>>> Fax: 00 353 1 7086952
>>> 
>>>> On 7 Jun 2016, at 11:34, Chuckk Hubbard  wrote:
>>>> 
>>>> So, -+rtaudio=null doesn't do the trick, either. Even with the named pipe reduced to 8 bytes and the notes and f0 extended to 200 seconds, Csound doesn't wait.
>>>> It could be that the program I'm using for RPi I2S is writing over what's in its transmit FIFO instead of adding to it, so it never registers as full, or it could be that Csound just won't stay open without -odac...?
>>>> -Chuckk
>>>> 
>>>> 
>>>> On Mon, Jun 6, 2016 at 9:18 PM, Victor Lazzarini  wrote:
>>>> One can use -+rtaudio=null which should emulate the timing of an audio card without connecting to one.
>>>> 
>>>> Victor Lazzarini
>>>> Dean of Arts, Celtic Studies, and Philosophy
>>>> Maynooth University
>>>> Ireland
>>>> 
>>>> On 6 Jun 2016, at 17:03, John  wrote:
>>>> 
>>>>> Surely the problem is that without -o DAC time will race away
>>>>> ==John
>>>>> 
>>>>> On 6 Jun 2016, at 16:38, Victor Lazzarini  wrote:
>>>>> f0 360000 ?
>>>>> 
>>>>> Victor Lazzarini
>>>>> Dean of Arts, Celtic Studies, and Philosophy
>>>>> Maynooth University
>>>>> Ireland
>>>>> 
>>>>> On 6 Jun 2016, at 13:36, Chuckk Hubbard < badmuthahubbard@GMAIL.COM> wrote:
>>>>> 
>>>>>> Hi.
>>>>>> 
>>>>>> I gave up on ALSA for my Raspberry Pi's audio output and modified some test code to use its I2S without creating a sound device. I'd like to send Csound output through a named pipe to this driver, and have Csound block when the named pipe is full (I will probably reduce its maximum size).
>>>>>> Csound doesn't stay open if I have a filename as -o output. I also don't expect to be able to use -o dac because the system currently has no registered audio devices and I was hoping to avoid having that extra bloat.
>>>>>> 
>>>>>> Any other way to keep Csound open and blocking, or must I create a dummy audio device, and use fout to send the actual audio?
>>>>>> Thanks!
>>>>>> -Chuckk
>>>>>> 
>>>>>> --
>>>>>> http://www.badmuthahubbard.com
>>>>>> Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here
>>>>> Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here
>>>>> Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here
>>>> Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here
>>>> 
>>>> 
>>>> 
>>>> --
>>>> http://www.badmuthahubbard.com
>>>> Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here
>>> 
>>> Csound mailing list
>>> Csound@listserv.heanet.ie
>>> https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
>>> Send bugs reports to
>>>       https://github.com/csound/csound/issues
>>> Discussions of bugs and features can be posted here
>>> 
>>> 
>>> 
>>> -- 
>>> http://www.badmuthahubbard.com
>>> 
>>> 
>>> 
>>> -- 
>>> http://www.badmuthahubbard.com
>>> Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here
>> 
>> Csound mailing list
>> Csound@listserv.heanet.ie
>> https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
>> Send bugs reports to
>>       https://github.com/csound/csound/issues
>> Discussions of bugs and features can be posted here
> 
> Csound mailing list
> Csound@listserv.heanet.ie
> https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
> Send bugs reports to
>        https://github.com/csound/csound/issues
> Discussions of bugs and features can be posted here

Csound mailing list
Csound@listserv.heanet.ie
https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
Send bugs reports to
        https://github.com/csound/csound/issues
Discussions of bugs and features can be posted here

Have you also tried this with OSC? I understood that this should be 
possible now, or via arrays, but I may be mixing things up...

Richard


On 07/06/16 14:04, Victor Lazzarini wrote:
> Maybe it didn’t block actually. I can’t say for sure, but the writer process only starts writing once I start the reader,
> then it races ahead. The reader needs to have a ctl-C sent to it to start outputting audio.
> ========================
> Dr Victor Lazzarini
> Dean of Arts, Celtic Studies and Philosophy,
> Maynooth University,
> Maynooth, Co Kildare, Ireland
> Tel: 00 353 7086936
> Fax: 00 353 1 7086952
>
>> On 7 Jun 2016, at 12:55, Victor Lazzarini  wrote:
>>
>> Interestingly I was able to make a pipe and run csound to it, in a blocking way, from one Csound instance to another (on OSX):
>>
>> writer
>> $ csound  -W -o pipe oscili.csd
>>
>> reader
>> $ csound -W -i pipe -o dac inout.csd
>>
>> I would expect it to work on linux.
>> ========================
>> Dr Victor Lazzarini
>> Dean of Arts, Celtic Studies and Philosophy,
>> Maynooth University,
>> Maynooth, Co Kildare, Ireland
>> Tel: 00 353 7086936
>> Fax: 00 353 1 7086952
>>
>>> On 7 Jun 2016, at 12:12, Victor Lazzarini  wrote:
>>>
>>> If you are using the API, it becomes much easier. All you need is to collect the samples from Csound and
>>> put in your open named pipe. Csound will not run away because you can control how often it calls the
>>> performKsmps() function.
>>>
>>> If you are not using the API, there is another alternative. You could try to use sockets, as Csound has UDP
>>> and TCP opcodes that you could use to write audio to a destination.
>>>
>>> regards
>>> ========================
>>> Dr Victor Lazzarini
>>> Dean of Arts, Celtic Studies and Philosophy,
>>> Maynooth University,
>>> Maynooth, Co Kildare, Ireland
>>> Tel: 00 353 7086936
>>> Fax: 00 353 1 7086952
>>>
>>>> On 7 Jun 2016, at 11:58, Chuckk Hubbard  wrote:
>>>>
>>>> Using -odac, monitor and fout, unfortunately, Csound does not block when the pipe written to by fout is full; it tells me "Csound ignoring SIGPIPE: Broken pipe". Maybe this is ultimately good, if I prefer to drop samples than to increase latency.
>>>> I was hoping to avoid writing a separate program with the API, but I believe it would be trivial to do this that way, no? A C program should block on a full FIFO by default.
>>>> Back to work...
>>>> -Chuckk
>>>>
>>>> On Tue, Jun 7, 2016 at 1:37 PM, Chuckk Hubbard  wrote:
>>>> Yes, after reading your question. It stays open, even though the system has no audio devices. Next stop: fout...
>>>>
>>>> On Tue, Jun 7, 2016 at 1:36 PM, Victor Lazzarini  wrote:
>>>> did you add -o dac?
>>>> ========================
>>>> Dr Victor Lazzarini
>>>> Dean of Arts, Celtic Studies and Philosophy,
>>>> Maynooth University,
>>>> Maynooth, Co Kildare, Ireland
>>>> Tel: 00 353 7086936
>>>> Fax: 00 353 1 7086952
>>>>
>>>>> On 7 Jun 2016, at 11:34, Chuckk Hubbard  wrote:
>>>>>
>>>>> So, -+rtaudio=null doesn't do the trick, either. Even with the named pipe reduced to 8 bytes and the notes and f0 extended to 200 seconds, Csound doesn't wait.
>>>>> It could be that the program I'm using for RPi I2S is writing over what's in its transmit FIFO instead of adding to it, so it never registers as full, or it could be that Csound just won't stay open without -odac...?
>>>>> -Chuckk
>>>>>
>>>>>
>>>>> On Mon, Jun 6, 2016 at 9:18 PM, Victor Lazzarini  wrote:
>>>>> One can use -+rtaudio=null which should emulate the timing of an audio card without connecting to one.
>>>>>
>>>>> Victor Lazzarini
>>>>> Dean of Arts, Celtic Studies, and Philosophy
>>>>> Maynooth University
>>>>> Ireland
>>>>>
>>>>> On 6 Jun 2016, at 17:03, John  wrote:
>>>>>
>>>>>> Surely the problem is that without -o DAC time will race away
>>>>>> ==John
>>>>>>
>>>>>> On 6 Jun 2016, at 16:38, Victor Lazzarini  wrote:
>>>>>> f0 360000 ?
>>>>>>
>>>>>> Victor Lazzarini
>>>>>> Dean of Arts, Celtic Studies, and Philosophy
>>>>>> Maynooth University
>>>>>> Ireland
>>>>>>
>>>>>> On 6 Jun 2016, at 13:36, Chuckk Hubbard < badmuthahubbard@GMAIL.COM> wrote:
>>>>>>
>>>>>>> Hi.
>>>>>>>
>>>>>>> I gave up on ALSA for my Raspberry Pi's audio output and modified some test code to use its I2S without creating a sound device. I'd like to send Csound output through a named pipe to this driver, and have Csound block when the named pipe is full (I will probably reduce its maximum size).
>>>>>>> Csound doesn't stay open if I have a filename as -o output. I also don't expect to be able to use -o dac because the system currently has no registered audio devices and I was hoping to avoid having that extra bloat.
>>>>>>>
>>>>>>> Any other way to keep Csound open and blocking, or must I create a dummy audio device, and use fout to send the actual audio?
>>>>>>> Thanks!
>>>>>>> -Chuckk
>>>>>>>
>>>>>>> --
>>>>>>> http://www.badmuthahubbard.com
>>>>>>> Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here
>>>>>> Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here
>>>>>> Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here
>>>>> Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here
>>>>>
>>>>>
>>>>>
>>>>> --
>>>>> http://www.badmuthahubbard.com
>>>>> Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here
>>>> Csound mailing list
>>>> Csound@listserv.heanet.ie
>>>> https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
>>>> Send bugs reports to
>>>>        https://github.com/csound/csound/issues
>>>> Discussions of bugs and features can be posted here
>>>>
>>>>
>>>>
>>>> -- 
>>>> http://www.badmuthahubbard.com
>>>>
>>>>
>>>>
>>>> -- 
>>>> http://www.badmuthahubbard.com
>>>> Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here
>>> Csound mailing list
>>> Csound@listserv.heanet.ie
>>> https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
>>> Send bugs reports to
>>>        https://github.com/csound/csound/issues
>>> Discussions of bugs and features can be posted here
>> Csound mailing list
>> Csound@listserv.heanet.ie
>> https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
>> Send bugs reports to
>>         https://github.com/csound/csound/issues
>> Discussions of bugs and features can be posted here
> Csound mailing list
> Csound@listserv.heanet.ie
> https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
> Send bugs reports to
>          https://github.com/csound/csound/issues
> Discussions of bugs and features can be posted here

Csound mailing list
Csound@listserv.heanet.ie
https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
Send bugs reports to
        https://github.com/csound/csound/issues
Discussions of bugs and features can be posted here

I am actually able to use fout for this, with the same setup as before, except that I use -f instead of -W in
the reader and -odac -+rtaudio=null in the writer. Once the reader is stopped I get a broken pipe error,
but otherwise it works OK.

========================
Dr Victor Lazzarini
Dean of Arts, Celtic Studies and Philosophy,
Maynooth University,
Maynooth, Co Kildare, Ireland
Tel: 00 353 7086936
Fax: 00 353 1 7086952 

> On 7 Jun 2016, at 13:08, Richard  wrote:
> 
> Have you also tried this with OSC? I understood that this should be possible now, or via arrays, but I may be mixing things up...
> 
> Richard
> 
> 
> On 07/06/16 14:04, Victor Lazzarini wrote:
>> Maybe it didn’t block actually. I can’t say for sure, but the writer process only starts writing once I start the reader,
>> then it races ahead. The reader needs to have a ctl-C sent to it to start outputting audio.
>> ========================
>> Dr Victor Lazzarini
>> Dean of Arts, Celtic Studies and Philosophy,
>> Maynooth University,
>> Maynooth, Co Kildare, Ireland
>> Tel: 00 353 7086936
>> Fax: 00 353 1 7086952
>> 
>>> On 7 Jun 2016, at 12:55, Victor Lazzarini  wrote:
>>> 
>>> Interestingly I was able to make a pipe and run csound to it, in a blocking way, from one Csound instance to another (on OSX):
>>> 
>>> writer
>>> $ csound  -W -o pipe oscili.csd
>>> 
>>> reader
>>> $ csound -W -i pipe -o dac inout.csd
>>> 
>>> I would expect it to work on linux.
>>> ========================
>>> Dr Victor Lazzarini
>>> Dean of Arts, Celtic Studies and Philosophy,
>>> Maynooth University,
>>> Maynooth, Co Kildare, Ireland
>>> Tel: 00 353 7086936
>>> Fax: 00 353 1 7086952
>>> 
>>>> On 7 Jun 2016, at 12:12, Victor Lazzarini  wrote:
>>>> 
>>>> If you are using the API, it becomes much easier. All you need is to collect the samples from Csound and
>>>> put in your open named pipe. Csound will not run away because you can control how often it calls the
>>>> performKsmps() function.
>>>> 
>>>> If you are not using the API, there is another alternative. You could try to use sockets, as Csound has UDP
>>>> and TCP opcodes that you could use to write audio to a destination.
>>>> 
>>>> regards
>>>> ========================
>>>> Dr Victor Lazzarini
>>>> Dean of Arts, Celtic Studies and Philosophy,
>>>> Maynooth University,
>>>> Maynooth, Co Kildare, Ireland
>>>> Tel: 00 353 7086936
>>>> Fax: 00 353 1 7086952
>>>> 
>>>>> On 7 Jun 2016, at 11:58, Chuckk Hubbard  wrote:
>>>>> 
>>>>> Using -odac, monitor and fout, unfortunately, Csound does not block when the pipe written to by fout is full; it tells me "Csound ignoring SIGPIPE: Broken pipe". Maybe this is ultimately good, if I prefer to drop samples than to increase latency.
>>>>> I was hoping to avoid writing a separate program with the API, but I believe it would be trivial to do this that way, no? A C program should block on a full FIFO by default.
>>>>> Back to work...
>>>>> -Chuckk
>>>>> 
>>>>> On Tue, Jun 7, 2016 at 1:37 PM, Chuckk Hubbard  wrote:
>>>>> Yes, after reading your question. It stays open, even though the system has no audio devices. Next stop: fout...
>>>>> 
>>>>> On Tue, Jun 7, 2016 at 1:36 PM, Victor Lazzarini  wrote:
>>>>> did you add -o dac?
>>>>> ========================
>>>>> Dr Victor Lazzarini
>>>>> Dean of Arts, Celtic Studies and Philosophy,
>>>>> Maynooth University,
>>>>> Maynooth, Co Kildare, Ireland
>>>>> Tel: 00 353 7086936
>>>>> Fax: 00 353 1 7086952
>>>>> 
>>>>>> On 7 Jun 2016, at 11:34, Chuckk Hubbard  wrote:
>>>>>> 
>>>>>> So, -+rtaudio=null doesn't do the trick, either. Even with the named pipe reduced to 8 bytes and the notes and f0 extended to 200 seconds, Csound doesn't wait.
>>>>>> It could be that the program I'm using for RPi I2S is writing over what's in its transmit FIFO instead of adding to it, so it never registers as full, or it could be that Csound just won't stay open without -odac...?
>>>>>> -Chuckk
>>>>>> 
>>>>>> 
>>>>>> On Mon, Jun 6, 2016 at 9:18 PM, Victor Lazzarini  wrote:
>>>>>> One can use -+rtaudio=null which should emulate the timing of an audio card without connecting to one.
>>>>>> 
>>>>>> Victor Lazzarini
>>>>>> Dean of Arts, Celtic Studies, and Philosophy
>>>>>> Maynooth University
>>>>>> Ireland
>>>>>> 
>>>>>> On 6 Jun 2016, at 17:03, John  wrote:
>>>>>> 
>>>>>>> Surely the problem is that without -o DAC time will race away
>>>>>>> ==John
>>>>>>> 
>>>>>>> On 6 Jun 2016, at 16:38, Victor Lazzarini  wrote:
>>>>>>> f0 360000 ?
>>>>>>> 
>>>>>>> Victor Lazzarini
>>>>>>> Dean of Arts, Celtic Studies, and Philosophy
>>>>>>> Maynooth University
>>>>>>> Ireland
>>>>>>> 
>>>>>>> On 6 Jun 2016, at 13:36, Chuckk Hubbard < badmuthahubbard@GMAIL.COM> wrote:
>>>>>>> 
>>>>>>>> Hi.
>>>>>>>> 
>>>>>>>> I gave up on ALSA for my Raspberry Pi's audio output and modified some test code to use its I2S without creating a sound device. I'd like to send Csound output through a named pipe to this driver, and have Csound block when the named pipe is full (I will probably reduce its maximum size).
>>>>>>>> Csound doesn't stay open if I have a filename as -o output. I also don't expect to be able to use -o dac because the system currently has no registered audio devices and I was hoping to avoid having that extra bloat.
>>>>>>>> 
>>>>>>>> Any other way to keep Csound open and blocking, or must I create a dummy audio device, and use fout to send the actual audio?
>>>>>>>> Thanks!
>>>>>>>> -Chuckk
>>>>>>>> 
>>>>>>>> --
>>>>>>>> http://www.badmuthahubbard.com
>>>>>>>> Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here
>>>>>>> Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here
>>>>>>> Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here
>>>>>> Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here
>>>>>> 
>>>>>> 
>>>>>> 
>>>>>> --
>>>>>> http://www.badmuthahubbard.com
>>>>>> Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here
>>>>> Csound mailing list
>>>>> Csound@listserv.heanet.ie
>>>>> https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
>>>>> Send bugs reports to
>>>>>       https://github.com/csound/csound/issues
>>>>> Discussions of bugs and features can be posted here
>>>>> 
>>>>> 
>>>>> 
>>>>> -- 
>>>>> http://www.badmuthahubbard.com
>>>>> 
>>>>> 
>>>>> 
>>>>> -- 
>>>>> http://www.badmuthahubbard.com
>>>>> Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here
>>>> Csound mailing list
>>>> Csound@listserv.heanet.ie
>>>> https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
>>>> Send bugs reports to
>>>>       https://github.com/csound/csound/issues
>>>> Discussions of bugs and features can be posted here
>>> Csound mailing list
>>> Csound@listserv.heanet.ie
>>> https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
>>> Send bugs reports to
>>>        https://github.com/csound/csound/issues
>>> Discussions of bugs and features can be posted here
>> Csound mailing list
>> Csound@listserv.heanet.ie
>> https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
>> Send bugs reports to
>>         https://github.com/csound/csound/issues
>> Discussions of bugs and features can be posted here
> 
> Csound mailing list
> Csound@listserv.heanet.ie
> https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
> Send bugs reports to
>       https://github.com/csound/csound/issues
> Discussions of bugs and features can be posted here

Csound mailing list
Csound@listserv.heanet.ie
https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
Send bugs reports to
        https://github.com/csound/csound/issues
Discussions of bugs and features can be posted here

and Csound runs in realtime pace.
========================
Dr Victor Lazzarini
Dean of Arts, Celtic Studies and Philosophy,
Maynooth University,
Maynooth, Co Kildare, Ireland
Tel: 00 353 7086936
Fax: 00 353 1 7086952 

> On 7 Jun 2016, at 13:14, Victor Lazzarini  wrote:
> 
> I am actually able to use fout for this, with the same setup as before, except that I use -f instead of -W in
> the reader and -odac -+rtaudio=null in the writer. Once the reader is stopped I get a broken pipe error,
> but otherwise it works OK.
> 
> ========================
> Dr Victor Lazzarini
> Dean of Arts, Celtic Studies and Philosophy,
> Maynooth University,
> Maynooth, Co Kildare, Ireland
> Tel: 00 353 7086936
> Fax: 00 353 1 7086952 
> 
>> On 7 Jun 2016, at 13:08, Richard  wrote:
>> 
>> Have you also tried this with OSC? I understood that this should be possible now, or via arrays, but I may be mixing things up...
>> 
>> Richard
>> 
>> 
>> On 07/06/16 14:04, Victor Lazzarini wrote:
>>> Maybe it didn’t block actually. I can’t say for sure, but the writer process only starts writing once I start the reader,
>>> then it races ahead. The reader needs to have a ctl-C sent to it to start outputting audio.
>>> ========================
>>> Dr Victor Lazzarini
>>> Dean of Arts, Celtic Studies and Philosophy,
>>> Maynooth University,
>>> Maynooth, Co Kildare, Ireland
>>> Tel: 00 353 7086936
>>> Fax: 00 353 1 7086952
>>> 
>>>> On 7 Jun 2016, at 12:55, Victor Lazzarini  wrote:
>>>> 
>>>> Interestingly I was able to make a pipe and run csound to it, in a blocking way, from one Csound instance to another (on OSX):
>>>> 
>>>> writer
>>>> $ csound  -W -o pipe oscili.csd
>>>> 
>>>> reader
>>>> $ csound -W -i pipe -o dac inout.csd
>>>> 
>>>> I would expect it to work on linux.
>>>> ========================
>>>> Dr Victor Lazzarini
>>>> Dean of Arts, Celtic Studies and Philosophy,
>>>> Maynooth University,
>>>> Maynooth, Co Kildare, Ireland
>>>> Tel: 00 353 7086936
>>>> Fax: 00 353 1 7086952
>>>> 
>>>>> On 7 Jun 2016, at 12:12, Victor Lazzarini  wrote:
>>>>> 
>>>>> If you are using the API, it becomes much easier. All you need is to collect the samples from Csound and
>>>>> put in your open named pipe. Csound will not run away because you can control how often it calls the
>>>>> performKsmps() function.
>>>>> 
>>>>> If you are not using the API, there is another alternative. You could try to use sockets, as Csound has UDP
>>>>> and TCP opcodes that you could use to write audio to a destination.
>>>>> 
>>>>> regards
>>>>> ========================
>>>>> Dr Victor Lazzarini
>>>>> Dean of Arts, Celtic Studies and Philosophy,
>>>>> Maynooth University,
>>>>> Maynooth, Co Kildare, Ireland
>>>>> Tel: 00 353 7086936
>>>>> Fax: 00 353 1 7086952
>>>>> 
>>>>>> On 7 Jun 2016, at 11:58, Chuckk Hubbard  wrote:
>>>>>> 
>>>>>> Using -odac, monitor and fout, unfortunately, Csound does not block when the pipe written to by fout is full; it tells me "Csound ignoring SIGPIPE: Broken pipe". Maybe this is ultimately good, if I prefer to drop samples than to increase latency.
>>>>>> I was hoping to avoid writing a separate program with the API, but I believe it would be trivial to do this that way, no? A C program should block on a full FIFO by default.
>>>>>> Back to work...
>>>>>> -Chuckk
>>>>>> 
>>>>>> On Tue, Jun 7, 2016 at 1:37 PM, Chuckk Hubbard  wrote:
>>>>>> Yes, after reading your question. It stays open, even though the system has no audio devices. Next stop: fout...
>>>>>> 
>>>>>> On Tue, Jun 7, 2016 at 1:36 PM, Victor Lazzarini  wrote:
>>>>>> did you add -o dac?
>>>>>> ========================
>>>>>> Dr Victor Lazzarini
>>>>>> Dean of Arts, Celtic Studies and Philosophy,
>>>>>> Maynooth University,
>>>>>> Maynooth, Co Kildare, Ireland
>>>>>> Tel: 00 353 7086936
>>>>>> Fax: 00 353 1 7086952
>>>>>> 
>>>>>>> On 7 Jun 2016, at 11:34, Chuckk Hubbard  wrote:
>>>>>>> 
>>>>>>> So, -+rtaudio=null doesn't do the trick, either. Even with the named pipe reduced to 8 bytes and the notes and f0 extended to 200 seconds, Csound doesn't wait.
>>>>>>> It could be that the program I'm using for RPi I2S is writing over what's in its transmit FIFO instead of adding to it, so it never registers as full, or it could be that Csound just won't stay open without -odac...?
>>>>>>> -Chuckk
>>>>>>> 
>>>>>>> 
>>>>>>> On Mon, Jun 6, 2016 at 9:18 PM, Victor Lazzarini  wrote:
>>>>>>> One can use -+rtaudio=null which should emulate the timing of an audio card without connecting to one.
>>>>>>> 
>>>>>>> Victor Lazzarini
>>>>>>> Dean of Arts, Celtic Studies, and Philosophy
>>>>>>> Maynooth University
>>>>>>> Ireland
>>>>>>> 
>>>>>>> On 6 Jun 2016, at 17:03, John  wrote:
>>>>>>> 
>>>>>>>> Surely the problem is that without -o DAC time will race away
>>>>>>>> ==John
>>>>>>>> 
>>>>>>>> On 6 Jun 2016, at 16:38, Victor Lazzarini  wrote:
>>>>>>>> f0 360000 ?
>>>>>>>> 
>>>>>>>> Victor Lazzarini
>>>>>>>> Dean of Arts, Celtic Studies, and Philosophy
>>>>>>>> Maynooth University
>>>>>>>> Ireland
>>>>>>>> 
>>>>>>>> On 6 Jun 2016, at 13:36, Chuckk Hubbard < badmuthahubbard@GMAIL.COM> wrote:
>>>>>>>> 
>>>>>>>>> Hi.
>>>>>>>>> 
>>>>>>>>> I gave up on ALSA for my Raspberry Pi's audio output and modified some test code to use its I2S without creating a sound device. I'd like to send Csound output through a named pipe to this driver, and have Csound block when the named pipe is full (I will probably reduce its maximum size).
>>>>>>>>> Csound doesn't stay open if I have a filename as -o output. I also don't expect to be able to use -o dac because the system currently has no registered audio devices and I was hoping to avoid having that extra bloat.
>>>>>>>>> 
>>>>>>>>> Any other way to keep Csound open and blocking, or must I create a dummy audio device, and use fout to send the actual audio?
>>>>>>>>> Thanks!
>>>>>>>>> -Chuckk
>>>>>>>>> 
>>>>>>>>> --
>>>>>>>>> http://www.badmuthahubbard.com
>>>>>>>>> Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here
>>>>>>>> Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here
>>>>>>>> Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here
>>>>>>> Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here
>>>>>>> 
>>>>>>> 
>>>>>>> 
>>>>>>> --
>>>>>>> http://www.badmuthahubbard.com
>>>>>>> Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here
>>>>>> Csound mailing list
>>>>>> Csound@listserv.heanet.ie
>>>>>> https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
>>>>>> Send bugs reports to
>>>>>>      https://github.com/csound/csound/issues
>>>>>> Discussions of bugs and features can be posted here
>>>>>> 
>>>>>> 
>>>>>> 
>>>>>> -- 
>>>>>> http://www.badmuthahubbard.com
>>>>>> 
>>>>>> 
>>>>>> 
>>>>>> -- 
>>>>>> http://www.badmuthahubbard.com
>>>>>> Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here
>>>>> Csound mailing list
>>>>> Csound@listserv.heanet.ie
>>>>> https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
>>>>> Send bugs reports to
>>>>>      https://github.com/csound/csound/issues
>>>>> Discussions of bugs and features can be posted here
>>>> Csound mailing list
>>>> Csound@listserv.heanet.ie
>>>> https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
>>>> Send bugs reports to
>>>>       https://github.com/csound/csound/issues
>>>> Discussions of bugs and features can be posted here
>>> Csound mailing list
>>> Csound@listserv.heanet.ie
>>> https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
>>> Send bugs reports to
>>>        https://github.com/csound/csound/issues
>>> Discussions of bugs and features can be posted here
>> 
>> Csound mailing list
>> Csound@listserv.heanet.ie
>> https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
>> Send bugs reports to
>>      https://github.com/csound/csound/issues
>> Discussions of bugs and features can be posted here
> 
> Csound mailing list
> Csound@listserv.heanet.ie
> https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
> Send bugs reports to
>        https://github.com/csound/csound/issues
> Discussions of bugs and features can be posted here

Csound mailing list
Csound@listserv.heanet.ie
https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
Send bugs reports to
        https://github.com/csound/csound/issues
Discussions of bugs and features can be posted here

Ok, but I was just curious if such a thing (audio stream) could be done 
now using OSC...

Richard


On 07/06/16 14:14, Victor Lazzarini wrote:
> I am actually able to use fout for this, with the same setup as before, except that I use -f instead of -W in
> the reader and -odac -+rtaudio=null in the writer. Once the reader is stopped I get a broken pipe error,
> but otherwise it works OK.
>
> ========================
> Dr Victor Lazzarini
> Dean of Arts, Celtic Studies and Philosophy,
> Maynooth University,
> Maynooth, Co Kildare, Ireland
> Tel: 00 353 7086936
> Fax: 00 353 1 7086952
>
>> On 7 Jun 2016, at 13:08, Richard  wrote:
>>
>> Have you also tried this with OSC? I understood that this should be possible now, or via arrays, but I may be mixing things up...
>>
>> Richard
>>
>>
>> On 07/06/16 14:04, Victor Lazzarini wrote:
>>> Maybe it didn’t block actually. I can’t say for sure, but the writer process only starts writing once I start the reader,
>>> then it races ahead. The reader needs to have a ctl-C sent to it to start outputting audio.
>>> ========================
>>> Dr Victor Lazzarini
>>> Dean of Arts, Celtic Studies and Philosophy,
>>> Maynooth University,
>>> Maynooth, Co Kildare, Ireland
>>> Tel: 00 353 7086936
>>> Fax: 00 353 1 7086952
>>>
>>>> On 7 Jun 2016, at 12:55, Victor Lazzarini  wrote:
>>>>
>>>> Interestingly I was able to make a pipe and run csound to it, in a blocking way, from one Csound instance to another (on OSX):
>>>>
>>>> writer
>>>> $ csound  -W -o pipe oscili.csd
>>>>
>>>> reader
>>>> $ csound -W -i pipe -o dac inout.csd
>>>>
>>>> I would expect it to work on linux.
>>>> ========================
>>>> Dr Victor Lazzarini
>>>> Dean of Arts, Celtic Studies and Philosophy,
>>>> Maynooth University,
>>>> Maynooth, Co Kildare, Ireland
>>>> Tel: 00 353 7086936
>>>> Fax: 00 353 1 7086952
>>>>
>>>>> On 7 Jun 2016, at 12:12, Victor Lazzarini  wrote:
>>>>>
>>>>> If you are using the API, it becomes much easier. All you need is to collect the samples from Csound and
>>>>> put in your open named pipe. Csound will not run away because you can control how often it calls the
>>>>> performKsmps() function.
>>>>>
>>>>> If you are not using the API, there is another alternative. You could try to use sockets, as Csound has UDP
>>>>> and TCP opcodes that you could use to write audio to a destination.
>>>>>
>>>>> regards
>>>>> ========================
>>>>> Dr Victor Lazzarini
>>>>> Dean of Arts, Celtic Studies and Philosophy,
>>>>> Maynooth University,
>>>>> Maynooth, Co Kildare, Ireland
>>>>> Tel: 00 353 7086936
>>>>> Fax: 00 353 1 7086952
>>>>>
>>>>>> On 7 Jun 2016, at 11:58, Chuckk Hubbard  wrote:
>>>>>>
>>>>>> Using -odac, monitor and fout, unfortunately, Csound does not block when the pipe written to by fout is full; it tells me "Csound ignoring SIGPIPE: Broken pipe". Maybe this is ultimately good, if I prefer to drop samples than to increase latency.
>>>>>> I was hoping to avoid writing a separate program with the API, but I believe it would be trivial to do this that way, no? A C program should block on a full FIFO by default.
>>>>>> Back to work...
>>>>>> -Chuckk
>>>>>>
>>>>>> On Tue, Jun 7, 2016 at 1:37 PM, Chuckk Hubbard  wrote:
>>>>>> Yes, after reading your question. It stays open, even though the system has no audio devices. Next stop: fout...
>>>>>>
>>>>>> On Tue, Jun 7, 2016 at 1:36 PM, Victor Lazzarini  wrote:
>>>>>> did you add -o dac?
>>>>>> ========================
>>>>>> Dr Victor Lazzarini
>>>>>> Dean of Arts, Celtic Studies and Philosophy,
>>>>>> Maynooth University,
>>>>>> Maynooth, Co Kildare, Ireland
>>>>>> Tel: 00 353 7086936
>>>>>> Fax: 00 353 1 7086952
>>>>>>
>>>>>>> On 7 Jun 2016, at 11:34, Chuckk Hubbard  wrote:
>>>>>>>
>>>>>>> So, -+rtaudio=null doesn't do the trick, either. Even with the named pipe reduced to 8 bytes and the notes and f0 extended to 200 seconds, Csound doesn't wait.
>>>>>>> It could be that the program I'm using for RPi I2S is writing over what's in its transmit FIFO instead of adding to it, so it never registers as full, or it could be that Csound just won't stay open without -odac...?
>>>>>>> -Chuckk
>>>>>>>
>>>>>>>
>>>>>>> On Mon, Jun 6, 2016 at 9:18 PM, Victor Lazzarini  wrote:
>>>>>>> One can use -+rtaudio=null which should emulate the timing of an audio card without connecting to one.
>>>>>>>
>>>>>>> Victor Lazzarini
>>>>>>> Dean of Arts, Celtic Studies, and Philosophy
>>>>>>> Maynooth University
>>>>>>> Ireland
>>>>>>>
>>>>>>> On 6 Jun 2016, at 17:03, John  wrote:
>>>>>>>
>>>>>>>> Surely the problem is that without -o DAC time will race away
>>>>>>>> ==John
>>>>>>>>
>>>>>>>> On 6 Jun 2016, at 16:38, Victor Lazzarini  wrote:
>>>>>>>> f0 360000 ?
>>>>>>>>
>>>>>>>> Victor Lazzarini
>>>>>>>> Dean of Arts, Celtic Studies, and Philosophy
>>>>>>>> Maynooth University
>>>>>>>> Ireland
>>>>>>>>
>>>>>>>> On 6 Jun 2016, at 13:36, Chuckk Hubbard < badmuthahubbard@GMAIL.COM> wrote:
>>>>>>>>
>>>>>>>>> Hi.
>>>>>>>>>
>>>>>>>>> I gave up on ALSA for my Raspberry Pi's audio output and modified some test code to use its I2S without creating a sound device. I'd like to send Csound output through a named pipe to this driver, and have Csound block when the named pipe is full (I will probably reduce its maximum size).
>>>>>>>>> Csound doesn't stay open if I have a filename as -o output. I also don't expect to be able to use -o dac because the system currently has no registered audio devices and I was hoping to avoid having that extra bloat.
>>>>>>>>>
>>>>>>>>> Any other way to keep Csound open and blocking, or must I create a dummy audio device, and use fout to send the actual audio?
>>>>>>>>> Thanks!
>>>>>>>>> -Chuckk
>>>>>>>>>
>>>>>>>>> --
>>>>>>>>> http://www.badmuthahubbard.com
>>>>>>>>> Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here
>>>>>>>> Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here
>>>>>>>> Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here
>>>>>>> Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> --
>>>>>>> http://www.badmuthahubbard.com
>>>>>>> Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here
>>>>>> Csound mailing list
>>>>>> Csound@listserv.heanet.ie
>>>>>> https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
>>>>>> Send bugs reports to
>>>>>>        https://github.com/csound/csound/issues
>>>>>> Discussions of bugs and features can be posted here
>>>>>>
>>>>>>
>>>>>>
>>>>>> -- 
>>>>>> http://www.badmuthahubbard.com
>>>>>>
>>>>>>
>>>>>>
>>>>>> -- 
>>>>>> http://www.badmuthahubbard.com
>>>>>> Csound mailing list Csound@listserv.heanet.ie https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND Send bugs reports to https://github.com/csound/csound/issues Discussions of bugs and features can be posted here
>>>>> Csound mailing list
>>>>> Csound@listserv.heanet.ie
>>>>> https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
>>>>> Send bugs reports to
>>>>>        https://github.com/csound/csound/issues
>>>>> Discussions of bugs and features can be posted here
>>>> Csound mailing list
>>>> Csound@listserv.heanet.ie
>>>> https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
>>>> Send bugs reports to
>>>>         https://github.com/csound/csound/issues
>>>> Discussions of bugs and features can be posted here
>>> Csound mailing list
>>> Csound@listserv.heanet.ie
>>> https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
>>> Send bugs reports to
>>>          https://github.com/csound/csound/issues
>>> Discussions of bugs and features can be posted here
>> Csound mailing list
>> Csound@listserv.heanet.ie
>> https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
>> Send bugs reports to
>>        https://github.com/csound/csound/issues
>> Discussions of bugs and features can be posted here
> Csound mailing list
> Csound@listserv.heanet.ie
> https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
> Send bugs reports to
>          https://github.com/csound/csound/issues
> Discussions of bugs and features can be posted here

Csound mailing list
Csound@listserv.heanet.ie
https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
Send bugs reports to
        https://github.com/csound/csound/issues
Discussions of bugs and features can be posted here

In principle audio can be sent via OSC but it has not been tested much
Only in 6.07