AV1: screen grabber, intel, audio out not working
AV2: dvswitch, AMD Athlon II X4 640, 2GB RAM, audio in/out working (but mixer connection)
AV3: camera, 2.8Ghz Celeron, 512MB RAM, audio in is not working
AV4: camera, AMD Athlon 64 3500+, 1GB RAM, audio in/out working
NOTE: system fails to boot a lot (dying?)

The equipment we are aiming to use in most places is as generic, affordable and commodity as possible. No component should be subject to vendor lock-in.

Cameras: any camera capable of delivering live DV rames, typically over firewire

PCs: any PC running Linux with a firewire capture card.

Mics: generic wireless lapel mics with standard connections;: either 3.5 mm jack, or potentially XLR.

Mixer: generic multi channel audio mixer