esm
—
ESS Technology Maestro 2/2E PCI Audio Accelerator audio device
driver
esm* at pci? dev ? function ?
audio* at audiobus?
The esm
device driver supports sound cards based on ESS
Technology Maestro, Maestro-2, and Maestro-2E PCI AC97 Audio Accelerator chips
(ES1968 and ES1978). Due to their power management capabilities, the Maestro
chips are often used in laptop and notebook systems.
The Maestro is a full-duplex device that allows independent
playback and recording at sample rates between 4000 Hz and 48 kHz. The sound
processor is capable of handling and converting 8 and 16 bit mono and stereo
data.
The esm
device driver appeared in
NetBSD 1.6.
Currently, this driver only supports 16-bit mono recording; an unknown bug
causes stereo recording to miss a channel. Also not supported yet are hardware
volume settings, MIDI, and joystick input.