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SND_MAESTRO3(4)        FreeBSD 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
     Allegro-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
     kernel.  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 <scottl@FreeBSD.org>
     Darrel Anderson <anderson@cs.duke.edu>

FreeBSD 11.0-PRERELEASE        December 14, 2004       FreeBSD 11.0-PRERELEASE

NAME | SYNOPSIS | DESCRIPTION | HARDWARE | DIAGNOSTICS | SEE ALSO | HISTORY | AUTHORS

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