[alsa-devel] Help! Playing multiple audio stream using alsa libraries

Arjun Sambamoorthy arjunsam at gmail.com
Thu Oct 1 20:22:59 CEST 2009

Hello all,

I am trying to play two audio streams using alsa libraries at the same
time, but I am not able to do so. I could play a single audio stream
I get bi-directional G711 MU Law RTP streams and I am using the sample
playback capture code from the tutorial section for playing it. I am
using the Non blocking and interleaved mode for playing the streams.

The alsa library plays both the audio streams for a few seconds but it
is incomprehensible and after few seconds I get the error "write to
audio interface failed (broken pipe)".

I also tried opening two pcm handles for each stream to the same
device ("default"), but the second handle is unusable gives the same
error "write to audio interface failed (broken pipe)".

I have the same problem playing two audio streams to the /dev/dsp device.

I am pretty sure I am not doing it the right way. Any help is highly
appreciated or pointer to links that explains how  to play multiple
streams using alsa.


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