Here, on amiga.org and metamorphos forums I've seen some user asking some questions and requesting support about sound devices working on MorphOS.
As you know, my Helios stack can handle such devices, but as you expect just having possibility to communicate to a device is not enough to use it.
We need specialized driver like the sbp2.class I've done to control SBP2 (SCSI over FW).

By checking what linux guys have already done in term of market filtering on this subet (see http://www.ffado.org/), it seems that most of working sound related hardware use the AVC protocol.
I know how to handle this protocol (i've already created a simple code to control my AVC DC-cam), so it could be possible in a near futur to have an avc.class to drive this sound hardware.

But (yes there is one) even if enough people are interested by that, I've not such hardware.. and I think never get (don't need that). And more other, I don't have enough skills in the audio domain to do anything myself.

So I'm searching for some people having:
- a machine with a registered MorphOS
- some FW sound hardware listed in the ffado supported list (see the upper linkg)... because need to support AVC protocol (becarefull, many devices uses propietary protocol).
- can be available for realtime testing (I'm on IRC).

So, send me a PM if you are interested.