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    SubjectRe: [Alsa-devel] RFC: OSS driver removal, a slightly different approach
    At Fri, 20 Jan 2006 15:25:54 +0100 (MET),
    Jan Engelhardt wrote:
    >
    > >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?

    This is exactly like the case of emu10k1. The chip supports only
    2-channel stereo streams. If you need a 4-channel interleaved stream,
    you have to merge the data in two individual streams to a single
    4-channel stream on software. Currently, this isn't handled in ALSA
    kernel-space OSS emulation.


    Takashi
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