.\"   $OpenBSD: maestro.4,v 1.4 2001/06/22 12:15:46 mpech Exp $
.\"
.\" Copyright (c) 2001 Marc Espie.
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.Dd January 13, 2001
.Dt MAESTRO 4
.Os
.Sh NAME
.Nm maestro
.Nd ESS Maestro 1 and 2 sound hardware driver
.Sh SYNOPSIS
.Cd "maestro* at pci? dev ? function ?"
.Cd "audio* at maestro?"
.Sh DESCRIPTION
The
.Nm
driver supports ESS maestro 1, 2 and 2E, and a few derived products like
NEC Versa, or NEC VersaProNX VA26D, as long as they use an AC'97 compliant
codec, which is always the case, except for very early models. It
does not support maestro 3 cards, which are entirely different.
.Pp
Maestro cards have direct support for 16 bit signed little-endian
mono and stereo, 8 bit signed and unsigned mono and stereo. Other encodings
are emulated in software. Sampling range is 4000 - 48000 Hz, with roughly
a 2 Hz resolution.
.Pp
Maestro cards have some DSP and dolby digital 5:1 hardware, but this driver
does not support it.
.Pp
Other functions of maestro cards (modem, joystick) are not supported.
.Pp
PCI interrupt sharing works, as long as other devices comply too.
.Sh HISTORY
Maestro hardware information was gleaned from the
.Fx
and Linux OSS drivers.
.Sh AUTHORS
David Leonard and Marc Espie.
.Sh SEE ALSO
.Xr ac97 4 ,
.Xr audio 4 ,
.Xr pci 4
.Sh BUGS
Recording should work soon.