SND_EMU10K1_PLAYBACK_CHANNELS
{ static_assert(stereo_mix == playback + SND_EMU10K1_PLAYBACK_CHANNELS); }
for (z = 0; z < SND_EMU10K1_PLAYBACK_CHANNELS + 2; z++)
capture = playback + SND_EMU10K1_PLAYBACK_CHANNELS;