64 lines
2.3 KiB
Groff
64 lines
2.3 KiB
Groff
.\" $NetBSD: esa.4,v 1.9 2008/05/13 20:04:28 jmcneill Exp $
|
|
.\"
|
|
.\" Copyright (c) 2001, 2002 Jared D. McNeill <jmcneill@invisible.ca>
|
|
.\" 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. Neither the name of the author nor the names of any
|
|
.\" contributors may be used to endorse or promote products derived
|
|
.\" from this software without specific prior written permission.
|
|
.\"
|
|
.\" 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 FOUNDATION 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.
|
|
.\"
|
|
.Dd May 13, 2008
|
|
.Dt ESA 4
|
|
.Os
|
|
.Sh NAME
|
|
.Nm esa
|
|
.Nd ESS Technology Allegro-1 / Maestro-3 family audio device driver
|
|
.Sh SYNOPSIS
|
|
.Cd "esa* at pci? dev ? function ?"
|
|
.Cd "audio* at audiobus?"
|
|
.Cd "options ESA_NUM_VOICES=4"
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Nm
|
|
driver provides support for the ESS Allegro-1 and Maestro-3 audio devices
|
|
on the PCI bus.
|
|
These devices are popular in laptop systems.
|
|
.Pp
|
|
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.
|
|
.Pp
|
|
Setting options ESA_NUM_VOICES=4 allows for hardware mixing in the device
|
|
driver.
|
|
Note that due to microcode constraints, the
|
|
.Nm
|
|
driver is currently limited to 4 simultaneous voices.
|
|
.Sh SEE ALSO
|
|
.Xr ac97 4 ,
|
|
.Xr audio 4 ,
|
|
.Xr pci 4
|
|
.Sh HISTORY
|
|
The
|
|
.Nm
|
|
device driver appeared in
|
|
.Nx 1.5.3 .
|
|
.Sh AUTHORS
|
|
.An Jared D. McNeill Aq jmcneill@invisible.ca
|