NAME
esa —
ESS Technology Allegro-1 / Maestro-3
family audio device driver
SYNOPSIS
esa* at pci? dev ? function ?
audio* at audiobus?
options ESA_NUM_VOICES=4
DESCRIPTION
Theesa 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.
SEE ALSO
HISTORY
The esa device driver appeared in
NetBSD 1.5.3.
AUTHORS
Jared D. McNeill <jmcneill@invisible.ca>