| Greetings:
I just tried using -+rtaudio=pa with the csd file appended below. Cs5
was built with a CVS update from about two hours ago. Here's what
happens with -odac2 (my Delta 66):
[dlphilp@localhost dlphilp]$ csound -+rtaudio=pa -odac2 -d -m0
-M/dev/snd/midiC0D0 midi-in.csd
Localisation of messages is disabled, using default language.
JACK real-time audio module for Csound by Istvan Varga
PortAudio real-time audio module for Csound by John ffitch
ALSA real-time audio module for Csound by Istvan Varga
0dBFS level = 32767.0
time resolution is 1.248 ns
Csound version 5.00 beta (float samples) Feb 17 2005
libsndfile-1.0.11
UnifiedCSD: midi-in.csd
STARTING FILE
Creating options
Creating orchestra
Creating /tmp/fileZJEGZy.orc (0x810e800)
Creating score
orchname: /tmp/fileZJEGZy.orc
scorename: /tmp/fileBp0luN.sco
**** allocgen tanh to 0x40686730
**** allocated 44
rtaudio: PortAudio module enabled
orch compiler:
12 lines read
instr 1
sorting score ...
... done
Csound version 5.00 beta (float samples) Feb 17 2005
midi channel 1 using instr 1
displays suppressed
0dBFS level = 32767.0
orch now loaded
audio buffered in 512 sample-frame blocks
ALSA lib pcm_hw.c:1057:(snd_pcm_hw_open) open /dev/snd/pcmC1D0c failed:
No such device
ALSA lib pcm_hw.c:1057:(snd_pcm_hw_open) open /dev/snd/pcmC1D0p failed:
No such device
Found 3 PortAudio devices:
Device 0: /dev/dsp
Maximum channels in: 16
Maximum channels out: 16
Default sample rate: 44100.000
Device 1: Sound Blaster Live!
Maximum channels in: 2
Maximum channels out: 2
Default sample rate: 44100.000
Device 2: M Audio Delta 66
Maximum channels in: 12
Maximum channels out: 10
Default sample rate: 44100.000
Suggested PortAudio output latency = 0.023220 seconds.
paBlockingWriteOpen: nchnls 1 sr 44100.000000 buffer frames 1024 device 2
paBlockingWriteOpen returned -9998.
<------------------ ???
PortAudio error -9998: Invalid number of channels. <----------------- ???
Failed to initialise real time audio output
inactive allocs returned to freespace
end of score. overall amps: 0.0
overall samples out of range: 0
0 errors in performance
Removing temporary file /tmp/fileFMtJ91 ...
Removing temporary file /tmp/fileBp0luN.sco ...
Removing temporary file /tmp/fileZJEGZy.orc ...
And here's what happens with -odac0 (my SBLive):
[dlphilp@localhost dlphilp]$ csound -+rtaudio=pa -odac0 -d -m0
-M/dev/snd/midiC0D0 midi-in.csd
Localisation of messages is disabled, using default language.
JACK real-time audio module for Csound by Istvan Varga
PortAudio real-time audio module for Csound by John ffitch
ALSA real-time audio module for Csound by Istvan Varga
0dBFS level = 32767.0
time resolution is 1.248 ns
Csound version 5.00 beta (float samples) Feb 17 2005
libsndfile-1.0.11
UnifiedCSD: midi-in.csd
STARTING FILE
Creating options
Creating orchestra
Creating /tmp/filelz2HGZ.orc (0x810e800)
Creating score
orchname: /tmp/filelz2HGZ.orc
scorename: /tmp/fileta8Vig.sco
**** allocgen tanh to 0x40686730
**** allocated 44
rtaudio: PortAudio module enabled
orch compiler:
12 lines read
instr 1
sorting score ...
... done
Csound version 5.00 beta (float samples) Feb 17 2005
midi channel 1 using instr 1
displays suppressed
0dBFS level = 32767.0
orch now loaded
audio buffered in 512 sample-frame blocks
ALSA lib pcm_hw.c:1057:(snd_pcm_hw_open) open /dev/snd/pcmC1D0c failed:
No such device
ALSA lib pcm_hw.c:1057:(snd_pcm_hw_open) open /dev/snd/pcmC1D0p failed:
No such device
Found 3 PortAudio devices:
Device 0: /dev/dsp
Maximum channels in: 16
Maximum channels out: 16
Default sample rate: 44100.000
Device 1: Sound Blaster Live!
Maximum channels in: 2
Maximum channels out: 2
Default sample rate: 44100.000
Device 2: M Audio Delta 66
Maximum channels in: 12
Maximum channels out: 10
Default sample rate: 44100.000
Suggested PortAudio output latency = 0.023220 seconds.
paBlockingWriteOpen: nchnls 1 sr 44100.000000 buffer frames 1024 device 0
paBlockingWriteOpen returned 0.
Opened PortAudio output device 0.
writing 1024-byte blks of shorts to dac0
(unknown)
SECTION 1:
Allocating 33060 bytes
ftable 1:
Allocating 33060 bytes
ftable 2:
Allocating 33060 bytes
ftable 3:
new alloc for instr 1: <--- response to keypress on my CZ101
new alloc for instr 1:
Killed
It works, but latency with -+rtaudio=pa and -odac0 is on the order of 1
second. Ouch.
I tried again with -odac:plughw:2 and latency was reduced to negligible.
Also, Ctrl-C did not end the process cleanly, I still had to kill it by pid.
Summarizing: With -+rtaudio=pa here's what happens with my audio devices:
-odac2 Csound complains about channels, then quits.
-odac0 Csound runs the file, but latency is awful.
-odac:plughw:2 Csound runs the file with very low latency
-odac:plughw:0 ditto
Again, the system here is Red Hat 9, GCC 3.2.2, ALSA 1.04.
Best regards,
dp
; midi-in.csd
; a test file
; for Linux with ALSA audio and MIDI devices
; -odac:plughw:2 -M/dev/snd/midiC0D0 -dm6
instr 1
iamp ampmidi 5000
kfreq cpsmidib
a1 oscili iamp,kfreq,1
a2 oscili iamp,kfreq*1.003,2
a3 oscili iamp,kfreq*.997,3
asig = a1+a2+a3
kenv linenr 1,.07,.11,.01
out asig*kenv
endin
; ==============================================
f1 0 8192 10 .1 0 .2 0 0 .4 0 0 0 0 .8
f2 0 8192 10 1 0 .9 0 0 .7 0 0 0 .4
f3 0 8192 10 .5 0 .6 0 0 .3 0 0 0 .9
f0 10000
e
Istvan Varga wrote:
> gogins@pipeline.com wrote:
>
>> What needs to be done with rtpa.c and pa_blocking.c? If I knew what
>> it was,
>> I would do it.
>
>
> I do not know, the complaints are by Art Hunkins and Dave Phillips.
> The only possible problems I have with rtpa.c are:
> * it tends to hang at the end of performance under Linux (at least
> on my system); not a serious issue - can still be stopped with ^C
> - but annoying.
> * it uses some static variables; this is only a coding issue, though.
> In addition, I am not sure why there is a need for a blocking I/O wrapper
> when the new PortAudio API does support blocking I/O (assuming that it
> is actually usable).
>
>
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