MAESTRO(4)                OpenBSD Programmer's Manual               MAESTRO(4)

NAME
     maestro - ESS Maestro 1 and 2 sound hardware driver

SYNOPSIS
     maestro* at pci? dev ? function ?
     audio* at maestro?

DESCRIPTION
     The maestro driver supports ESS maestro 1, 2 and 2E, including OEM prod-
     ucts that identify as 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.

     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 rough-
     ly a 2 Hz resolution.

     Maestro cards have some DSP and dolby digital 5:1 hardware, but this
     driver does not support it.

     Other functions of maestro cards (modem, joystick) are not supported.

     PCI interrupt sharing works, as long as other devices comply too.

HISTORY
     Maestro hardware information was gleaned from the FreeBSD and Linux OSS
     drivers.

AUTHORS
     David Leonard and Marc Espie.

SEE ALSO
     ac97(4), audio(4), pci(4)

BUGS
     Very old cards with a PT101 mixer component should have partial support,
     e.g., the mixer does not work.

     Recording should work soon.

OpenBSD 3.0                    January 13, 2001                              1
