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[Cs-dev] RT audio still a problem

Date2005-02-24 08:48
Fromjpff@codemist.co.uk
Subject[Cs-dev] RT audio still a problem
I hacked the portaudio build code and managed to create a linkable
library.  I am now stuck with

cage:~/Sourceforge/csound5> ./csound -o dac:plughw:0 examples/trapped.csd
Localisation of messages is disabled, using default language.
PortAudio real-time audio module for Csound
PortMIDI real time MIDI plugin for Csound
0dBFS level = 32767.0
.......
Found 4 PortAudio devices:
Device  0: /dev/dsp
           Maximum channels in:      16
           Maximum channels out:     16
           Default sample rate:   44100.000
Device  1: M Audio Delta DiO 2496: ICE1712 multi (hw:0,0)
           Maximum channels in:      12
           Maximum channels out:     10
           Default sample rate:   44100.000
Device  2: analog
           Maximum channels in:     128
           Maximum channels out:    128
           Default sample rate:   44100.000
Device  3: digital
           Maximum channels in:     128
           Maximum channels out:    128
           Default sample rate:   44100.000
Using Portaudio output device plughw:0.
Suggested PortAudio output latency = 0.000000 seconds.
paBlockingWriteOpen: nchnls 2 sr 44100.000000 buffer frames 1024 device -2
Csound tidy up: Segmentation fault

If I play to -o dac it runs but device 0 is noise.

The error is 
[Switching to Thread 182908691648 (LWP 6784)]
OpenStream (hostApi=0x69aae0, s=0x6b4c68, inputParameters=0x0, 
    outputParameters=0x7fbfffedf0, sampleRate=Variable "sampleRate" is not available.
) at pa_linux_alsa.c:1652
1652            stream->playback.numHostChannels = MAX( numOutputChannels, outputDeviceInfo->minOutputChannels );

and

(gdb) print outputDeviceInfo
$2 = (const PaAlsaDeviceInfo *) 0x0

Does this suggest an error in PortAudio or in the way it is called?

==John ffitch


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