This is same problem as with emu10k1
4 chanels are splited to front and rear alsa devices and there is virtual 4 channel device implemented using alsa-libs plugins in user space.
Alsa applications uses this virtual device when plaing 4 channel sound. Alsa-oss kernel emulation doesn't know about this and uses alsa hw devices directly, but only as separated devices (front and rear).
You can try to use aoss (I not tested this).
Peter Zubaj
>>Hi,
>>
>>On Thursday 19 January 2006 18:46, Adrian Bunk wrote:
>>> SOUND_EMU10K1
>>> - ALSA #1735 (OSS emulation 4-channel mode rear channels not working)
>>
>>If I understand alsa - oss emulation correctly, I think, this will be not
>>fixed soon (my opinion - never). This is too much work for too little gain.
>
>On that way, I'd like to inquiry something:
>I have a card that works with the snd-cs46xx module.
>With the OSS emulation (/dev/dsp), I can only output 2 channels, and the
>other two must be sent to /dev/adsp. Is this intended? Would not it be
>easier to make /dev/dsp allow receiving an ioctl setting 4 channels?
>
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