On Thu, 11 Dec 2003, Rishabh Kumar Goel wrote:

> I m working on the audio support of NetBSD, (AC97, AD1881A). I have to write a
> driver for the AC97 link controller. Is there any  audio framework in NetBSD,
> which can help me design the driver.

I've never written an audio driver, but I think you want to look at
audio(9). Also, you might prefer to extend the existing AC97 driver:
"/usr/src/sys/dev/ic/ac97*".

Frederick