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
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.
SEE ALSO
ac97(4),
audio(4),
pci(4)
HISTORY
The
esa device driver appeared in
NetBSD
1.5.3.
AUTHORS
Jared D. McNeill
<
jmcneill@invisible.ca>