I'm currently working with csound and real time audio and midi and having
some problems with drop out. I've tried many different buffer sizes with
no result. I think that the problem is to set the correct priorities of
csound (I'm running the command line csound).

According to the manual we should be able to change the priorities with 
the --sched. I've tried both --sched and --sched=80,90,10 with no success.

I recall reading on the list last year that it would be necessary to
rebuilt csound using this line:
scons useALSA=0 useJack=0 gcc3opt=7450 useAltivec=1
is this still actual?

Thanks for any help.

Luis

I'm running osx 10.3.9 on a G4/1.4GHz/896MB with a Motu 828 FireWire
csound -d -odac -M1 -+rtaudio=coreaudio -b256 -B512 -+buffnos=2 midisine.csd


-- 
Luís Antunes Pena
http://icem.folkwang-hochschule.de/~pena

--sched is Linux only.

You should not need to re-build csound. Try using the
portaudio module to see if you get a better result.

csound -d -odac -M1 -b256 -B1024 ...

Victor

At 10:58 25/04/2006, you wrote:
>I'm currently working with csound and real time audio and midi and having
>some problems with drop out. I've tried many different buffer sizes with
>no result. I think that the problem is to set the correct priorities of
>csound (I'm running the command line csound).
>
>According to the manual we should be able to change the priorities with
>the --sched. I've tried both --sched and --sched=80,90,10 with no success.
>
>I recall reading on the list last year that it would be necessary to
>rebuilt csound using this line:
>scons useALSA=0 useJack=0 gcc3opt=7450 useAltivec=1
>is this still actual?
>
>Thanks for any help.
>
>Luis
>
>I'm running osx 10.3.9 on a G4/1.4GHz/896MB with a Motu 828 FireWire
>csound -d -odac -M1 -+rtaudio=coreaudio -b256 -B512 -+buffnos=2 midisine.csd
>
>
>--
>Luís Antunes Pena
>http://icem.folkwang-hochschule.de/~pena
>--
>Send bugs reports to this list.
>To unsubscribe, send email to csound-unsubscribe@lists.bath.ac.uk

Victor Lazzarini
Music Technology Laboratory
Music Department
National University of Ireland, Maynooth 

Luis,
Your problem sounds similar to one I had.  After much playing around  
and suggestions from the csound list, I settled on these flags:

-odac --midi-device=1 -m0 -d -B512 -b256

The -m0 and -d seemed to make the most difference on my PowerBook G4  
1.5 OS10.4.5  system.
Mitch




On Apr 25, 2006, at 5:58 AM, Luís Antunes Pena wrote:

> I'm currently working with csound and real time audio and midi and  
> having
> some problems with drop out. I've tried many different buffer sizes  
> with
> no result. I think that the problem is to set the correct  
> priorities of
> csound (I'm running the command line csound).
>
> According to the manual we should be able to change the priorities  
> with
> the --sched. I've tried both --sched and --sched=80,90,10 with no  
> success.
>
> I recall reading on the list last year that it would be necessary to
> rebuilt csound using this line:
> scons useALSA=0 useJack=0 gcc3opt=7450 useAltivec=1
> is this still actual?
>
> Thanks for any help.
>
> Luis
>
> I'm running osx 10.3.9 on a G4/1.4GHz/896MB with a Motu 828 FireWire
> csound -d -odac -M1 -+rtaudio=coreaudio -b256 -B512 -+buffnos=2  
> midisine.csd
>
>
> -- 
> Luís Antunes Pena
> http://icem.folkwang-hochschule.de/~pena
> --
> Send bugs reports to this list.
> To unsubscribe, send email to csound-unsubscribe@lists.bath.ac.uk

yes, the graphics are costly on OSX, so disabling messages
is always a good idea!

Victor

At 14:32 25/04/2006, you wrote:
>Luis,
>Your problem sounds similar to one I had.  After much playing around
>and suggestions from the csound list, I settled on these flags:
>
>-odac --midi-device=1 -m0 -d -B512 -b256
>
>The -m0 and -d seemed to make the most difference on my PowerBook G4
>1.5 OS10.4.5  system.
>Mitch
>
>
>
>
>On Apr 25, 2006, at 5:58 AM, Luís Antunes Pena wrote:
>
>>I'm currently working with csound and real time audio and midi and
>>having
>>some problems with drop out. I've tried many different buffer sizes
>>with
>>no result. I think that the problem is to set the correct
>>priorities of
>>csound (I'm running the command line csound).
>>
>>According to the manual we should be able to change the priorities
>>with
>>the --sched. I've tried both --sched and --sched=80,90,10 with no
>>success.
>>
>>I recall reading on the list last year that it would be necessary to
>>rebuilt csound using this line:
>>scons useALSA=0 useJack=0 gcc3opt=7450 useAltivec=1
>>is this still actual?
>>
>>Thanks for any help.
>>
>>Luis
>>
>>I'm running osx 10.3.9 on a G4/1.4GHz/896MB with a Motu 828 FireWire
>>csound -d -odac -M1 -+rtaudio=coreaudio -b256 -B512 -+buffnos=2
>>midisine.csd
>>
>>
>>--
>>Luís Antunes Pena
>>http://icem.folkwang-hochschule.de/~pena
>>--
>>Send bugs reports to this list.
>>To unsubscribe, send email to csound-unsubscribe@lists.bath.ac.uk
>
>--
>Send bugs reports to this list.
>To unsubscribe, send email to csound-unsubscribe@lists.bath.ac.uk

Victor Lazzarini
Music Technology Laboratory
Music Department
National University of Ireland, Maynooth