sound not audible



I've just installed FC6 by way of a change from the *BSD's I'm used to. I'm having dreadful problems getting any sound out of the system. (I have checked mixer levels! :-) )

Running audacity lets me record successfully (at least, using the laptop's mic - I can see the signal is present), but any attempt to play back (with audacity or otherwise) "goes through the motions" as if playback is occurring - but no sound from the speakers. (XP is also on this box - so I know the speakers do actually work!) amixer shows a likely set of levels; alsamixer claims levels are up full and the outputs all enabled. I'm at a loss for what to check next. I have to admit that the correlation between the channel names displayed by the mixers and what the laptop offers is not entirely obvious :-(

Any ideas please?

This is on an acer 5601 laptop, and my long-term intention is to use it for a simple portable sound system. To this end, I'd intend eventually buying a usb audio interface - any recommendations for something to handle stereo line or mic inputs and stereo output (duplexed) and that will run [hassle-free!!] under linux would be welcome. I'd guess I'm looking at hi-end domestic or low semi-pro quality devices.

TIA for any pointers.

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