Surround40 playback seems to work on my SB Live emu10k1.
It is limit of current alsa-lib configuration. We cannot distinct playback and capture. But I am not sure, if returning an error helps you (surround40 configuration is NOT valid for emu10k1). I suggest to fix jack to allow different names for playback and capture with different count of channels.
Jaroslav
Some SB Live cards have 2 stereo audio inputs, so in theory they should be able to do Surround40 capture as well.
Can the SB Live do 4 channel full duplex, or is there another factor involved.
Cheers James
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