I've tried this on the Freespire forums but received a deafening silence.

I'm running Freespire 2 on an Acer 5315. I've tried various softphones (XLite, Kphone, Linphone, Gizmo etc). They will dial numbers, but they will not respond to either the internal or an external microphone.

lspci | grep Audio returns:
00:1b.0 Audio device: Intel Corporation 82801H (ICH8 Family) HD Audio Controller (rev 03)

The sound works (with occasional KMix crashes), and I can record through the microphone using Krecord.

Any suggestions welcome...