1.\" $NetBSD: esa.4,v 1.11 2014/03/18 18:20:39 riastradh Exp $ 2.\" 3.\" Copyright (c) 2001, 2002 Jared D. McNeill <jmcneill@invisible.ca> 4.\" All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Neither the name of the author nor the names of any 12.\" contributors may be used to endorse or promote products derived 13.\" from this software without specific prior written permission. 14.\" 15.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS 16.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 17.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 18.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 19.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 20.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 21.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 22.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 23.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 24.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 25.\" POSSIBILITY OF SUCH DAMAGE. 26.\" 27.Dd May 13, 2008 28.Dt ESA 4 29.Os 30.Sh NAME 31.Nm esa 32.Nd ESS Technology Allegro-1 / Maestro-3 family audio device driver 33.Sh SYNOPSIS 34.Cd "esa* at pci? dev ? function ?" 35.Cd "audio* at audiobus?" 36.Cd "options ESA_NUM_VOICES=4" 37.Sh DESCRIPTION 38The 39.Nm 40driver provides support for the ESS Allegro-1 and Maestro-3 audio devices 41on the PCI bus. 42These devices are popular in laptop systems. 43.Pp 44The Allegro-1 and the Maestro-3 are full-duplex devices that allow 45independent playback and recording at sample rates between 8000Hz and 4648000Hz and are capable of playback at 8 and 16 bit in mono and stereo. 47.Pp 48Setting options ESA_NUM_VOICES=4 allows for hardware mixing in the device 49driver. 50Note that due to microcode constraints, the 51.Nm 52driver is currently limited to 4 simultaneous voices. 53.Sh SEE ALSO 54.Xr ac97 4 , 55.Xr audio 4 , 56.Xr pci 4 57.Sh HISTORY 58The 59.Nm 60device driver appeared in 61.Nx 1.5.3 . 62.Sh AUTHORS 63.An Jared D. McNeill Aq Mt jmcneill@invisible.ca 64