65 lines
2.5 KiB
Groff
65 lines
2.5 KiB
Groff
.\" $NetBSD: esm.4,v 1.6 2005/06/22 04:19:09 kent Exp $
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.\"
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.\" Copyright (c) 2001 Rene Hexel
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. The name of the author may not be used to endorse or promote products
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.\" derived from this software without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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.\" BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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.\" LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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.\" AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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.\" OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.Dd June 22, 2005
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.Dt ESM 4
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.Os
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.Sh NAME
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.Nm esm
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.Nd ESS Technology Maestro 2/2E PCI Audio Accelerator audio device driver
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.Sh SYNOPSIS
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.Cd "esm* at pci? dev ? function ?"
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.Cd "audio* at audiobus?"
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.Sh DESCRIPTION
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The
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.Nm
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device driver supports sound cards based on ESS Technology Maestro,
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Maestro-2, and Maestro-2E PCI AC97 Audio Accelerator chips (ES1968 and ES1978).
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Due to their power management capabilities, the Maestro chips are often used
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in laptop and notebook systems.
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.Pp
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The Maestro is a full-duplex device that allows independent playback and
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recording at sample rates between 4000 Hz and 48 kHz.
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The sound processor is capable of handling and converting 8 and 16 bit mono
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and stereo data.
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.Sh SEE ALSO
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.Xr ac97 4 ,
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.Xr audio 4 ,
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.Xr joy 4 ,
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.Xr mpu 4 ,
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.Xr pci 4
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.Sh HISTORY
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The
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.Nm
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device driver appeared in
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.Nx 1.6 .
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.Sh BUGS
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Currently, this driver only supports 16-bit mono recording; an unknown bug
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causes stereo recording to miss a channel.
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Also not supported yet are hardware volume settings, MIDI, and joystick input.
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