74 lines
2.8 KiB
Groff
74 lines
2.8 KiB
Groff
|
.\" Copyright (c) 2001 Scott Long
|
||
|
|
.\" All rights reserved.
|
||
|
|
.\"
|
||
|
|
.\" Redistribution and use in source and binary forms, with or without
|
||
|
|
.\" modification, are permitted provided that the following conditions
|
||
|
|
.\" are met:
|
||
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
||
|
|
.\" notice, this list of conditions and the following disclaimer.
|
||
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
||
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
||
|
|
.\" documentation and/or other materials provided with the distribution.
|
||
|
|
.\"
|
||
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
||
|
|
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||
|
|
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||
|
|
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
||
|
|
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||
|
|
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||
|
|
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||
|
|
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||
|
|
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||
|
|
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||
|
|
.\" SUCH DAMAGE.
|
||
|
|
.\"
|
||
|
|
.\" $FreeBSD$
|
||
|
|
.\"
|
||
|
|
.Dd October 14, 2001
|
||
|
|
.Dt MAESTRO3 4
|
||
|
|
.Os
|
||
|
|
.Sh NAME
|
||
|
|
.Nm maestro3
|
||
|
|
.Nd FreeBSD audio sub-driver for ESS Maestro3/Allegro-1 hardware
|
||
|
|
.Sh SYNOPSIS
|
||
|
|
.Dl kldload snd_maestro3
|
||
|
|
.Sh DESCRIPTION
|
||
|
|
The
|
||
|
|
.Nm
|
||
|
|
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.
|
||
|
|
.Pp
|
||
|
|
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, nor is it compiled into the kernel when
|
||
|
|
.Cd "device pcm"
|
||
|
|
is specified in the kernel config file.
|
||
|
|
A convenient way to automatically load the driver is to add the line
|
||
|
|
.Dq Li snd_maestro3=yes
|
||
|
|
to the file
|
||
|
|
.Pa /boot/loader.conf .
|
||
|
|
.Sh 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
|
||
|
|
.Dq Li hint.pcm.0.hwvol_config="0"
|
||
|
|
to the file
|
||
|
|
.Pa /boot/device.hints
|
||
|
|
to override the default setting.
|
||
|
|
.Sh SEE ALSO
|
||
|
|
.Xr pcm 4 ,
|
||
|
|
.Xr loader.conf 5
|
||
|
|
.Sh HISTORY
|
||
|
|
The
|
||
|
|
.Nm
|
||
|
|
driver first appeared in
|
||
|
|
.Fx 4.3 .
|
||
|
|
.Sh AUTHORS
|
||
|
|
.An Scott Long <scottl@freebsd.org>
|
||
|
|
.An Darrel Anderson <anderson@cs.duke.edu>
|