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Thank you.

ESA(4)                       Device Drivers Manual                      ESA(4)

     esa - ESS Technology Allegro-1 / Maestro-3 family audio device driver

     esa*   at pci? dev ? function ?
     audio* at audiobus?
     options ESA_NUM_VOICES=4

     The esa driver provides support for the ESS Allegro-1 and Maestro-3 audio
     devices on the PCI bus.  These devices are popular in laptop systems.

     The Allegro-1 and the Maestro-3 are full-duplex devices that allow
     independent playback and recording at sample rates between 8000Hz and
     48000Hz and are capable of playback at 8 and 16 bit in mono and stereo.

     Setting options ESA_NUM_VOICES=4 allows for hardware mixing in the device
     driver.  Note that due to microcode constraints, the esa driver is
     currently limited to 4 simultaneous voices.

     ac97(4), audio(4), pci(4)

     The esa device driver appeared in NetBSD 1.5.3.

     Jared D. McNeill <jmcneill@invisible.ca>

NetBSD 8.0                       May 13, 2008                       NetBSD 8.0