unixdev.net


Switch to SpeakEasy.net DSL

The Modular Manual Browser

Home Page
Manual: (FreeBSD-5.4-RELEASE)
Page:
Section:
Apropos / Subsearch:
optional field

SND_MAESTRO3(4)          BSD Kernel Interfaces Manual          SND_MAESTRO3(4)

NAME
     snd_maestro3 -- ESS Maestro3/Allegro-1 bridge device driver

SYNOPSIS
     device sound
     device "snd_maestro3"

DESCRIPTION
     The snd_maestro3 driver provides support for the ESS Maestro3 and Alle-
     gro-1 sound chips under the PCM framework.  These chips are mostly found
     in laptop computers and feature an AC97 mixer, a multi-channel sample
     rate converter that can mix up to four digital audio streams in hardware,
     recording support, and external volume control buttons.

     The firmware for the sound processor is licensed under the GNU Public
     License, and thus this driver is not included in the default GENERIC ker-
     nel.  A convenient way to automatically load the driver is to add the
     line

           snd_maestro3_load="YES"

     to the file /boot/loader.conf.

HARDWARE
     The snd_maestro3 driver supports the following audio devices:

     o   ESS Technology Allegro-1
     o   ESS Technology Maestro3

DIAGNOSTICS
     The hardware volume control buttons can be connected to two different pin
     sets on the chip, depending on the manufacturer.  The driver has no way
     of determining this configuration, so a hint may be used to override the
     default guess.  Add the line ``hint.pcm.0.hwvol_config="0"'' to the file
     /boot/device.hints to override the default setting.

SEE ALSO
     sound(4), loader.conf(5)

HISTORY
     The snd_maestro3 driver first appeared in FreeBSD 4.3.

AUTHORS
     Scott Long <scottlATFreeBSD.org>
     Darrel Anderson <andersonATcs.edu>

BSD                            December 14, 2004                           BSD