ESA(4) FreeBSD Kernel Interfaces Manual ESA(4)
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 <
[email protected]>
FreeBSD 14.1-RELEASE-p8 May 13, 2008 FreeBSD 14.1-RELEASE-p8