This is to correct a statement I made previously in a post on this log [earth tech] about KNOPPIX and the audio capability on the HP Pavilion a220n.
The audio input does in fact work under the KNOPPIX 5.0.1 LiveCD release. I missed this because, while the audio output worked fine once the audio sub-system was enabled via the KDE Control Center | Sounds & Multimedia | Sound System control panel, the mic input levels were defaulting to zero, so no singal was being captured.
Links: