[openal] A 5.1 32-bit source kills a stereo 16-bit one on OpenAL Soft

Chris Robinson chris.kcat at gmail.com
Sat Oct 4 05:44:03 EDT 2014

On 10/03/2014 08:22 AM, Leszek Godlewski wrote:
> Hi everyone,
> I'm experiencing a bug in OpenAL Soft 1.13 on Linux where with two sources
> playing, only one can be heard. The exact use case is as follows:
> [...]
> There are no other sources playing. Both sources have been put at (0,0,0)
> AL_MIN_GAIN at 1.f. Preliminary debugging within OpenAL Soft shows that
> both sources are active (I've put breakpoints in aluMixData() and inspected
> the context).

The 5.1 audio stream does play while the stereo stream goes quiet? Does 
the stereo stream come back when the 5.1 stream ends? Do the sources 
continue to increment their offset (querying the AL_SAMPLE_OFFSET source 
property) when both are supposed to be playing?

There shouldn't be any problem with playing a 5.1 and stereo stream at 
the same time. The first thing I'd try is to update OpenAL Soft; the 
most recent version is 1.16.

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