NAME
auich —
Intel ICH integrated AC'97 audio
device
SYNOPSIS
auich* at pci? flags 0x0000
audio* at auich?
DESCRIPTION
The auich driver provides support for the
integrated AC'97 audio controller present on the Intel ICH I/O controller
hub and compatible chipsets.
Supported chipsets:
- AMD 768, 8111
- Intel 6300ESB/6321ESB
- Intel 82440MX
- Intel 82801 (ICH, ICH0, ICH2, ICH3, ICH4, ICH5, ICH6, ICH7)
- NVIDIA nForce, nForce2, nForce3, nForce4
- SiS 7012
The auich DMA engine supports full-duplex
operation and has separate channels for line input and microphone.
Unfortunately, simultaneous recording from both line and microphone inputs
is not supported due to the current
ac97(4) design. Setting flags to 0x0001 will
compensate for machines that have reversed stereo.
SEE ALSO
HISTORY
The auich device driver appeared in
OpenBSD 2.8.
CAVEATS
Some hardware implementations only support 48kHz sampling rates.