NAME    [Toc]    [Back]

     maestro - ESS Maestro 1 and 2 audio driver

SYNOPSIS    [Toc]    [Back]

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

DESCRIPTION    [Toc]    [Back]

     The maestro driver supports ESS maestro 1, 2 and 2E, including OEM products
 that identify as NEC Versa, or NEC VersaProNX VA26D, as
long as they
     use an AC97 compliant codec, which is always the  case,  except for very
     early  models.   It  does not support maestro 3 cards, which
are entirely
     different and supported by the esa(4) driver.

     Maestro cards have direct support for 16 bit signed  littleendian 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.

     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.

SEE ALSO    [Toc]    [Back]

     ac97(4), audio(4), esa(4), intro(4), pci(4)

HISTORY    [Toc]    [Back]

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

AUTHORS    [Toc]    [Back]

     David Leonard and Marc Espie.

BUGS    [Toc]    [Back]

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

     Recording should work soon.

OpenBSD     3.6                        January      13,      2001