linuxaudio.org

(de-lurk mode)
Hi all,
I keep getting an error when starting Audacity. It reads "There was an

error initialising the audio i/o layer. You will not be able to play

audio".
It then starts & works, apart from not being able to play what it is

doing.
The strange thing is that it worked fine the first time I used it (I

recently "rested" Debian in order to try Ubuntu, so it's a new

installation). Every time since then, it has shown this error.
Everything else seems to be working fine on the audio front: XMMS is

happy, MIDI is working, even Audacity is functioning, but I have to play

files saved in Audacity via XMMS.
Is there something silly that I've missed? I can't work out why it would

play audio once & then not subsequently.
Any help appreciated.
TIA
Gavin.