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ESA(4)                   BSD Kernel Interfaces Manual                   ESA(4)

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

SYNOPSIS
     esa*   at pci?
     audio* at esa?

DESCRIPTION
     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 inde-
     pendent playback and recording at sample rates between 8000Hz and 48000Hz
     and are capable of playback at 8 and 16 bit in mono and stereo.

SEE ALSO
     ac97(4), audio(4), intro(4), maestro(4), pci(4)

HISTORY
     The esa device driver appeared in OpenBSD 3.1.

AUTHORS
     Jared D. McNeill <jmcneill@invisible.ca>

BUGS
     Hardware volume control is not yet supported by this driver.

BSD                             March 24, 2017                             BSD