In message <0047DC45-E864-414A-B1D2-3424777C73E9@invisible.ca>, "Jared D. McNei
ll" writes:
>The esa(4) driver already supports this -- hardware mixing of 4  
>independent playback channels by calling audio_attach_mi() four  
>times. To enable support, set 'options ESA_NUM_VOICES=4' in your  
>kernel config.

If memory serves, this showed up as esa0 through esa3.  Wouldn't it be cool
to have the kernel just handle multiple openers of, for instance, "esa0", and
possibly even have the option of doing mixing in software when necessary?

-s