Graham.
In a terminal type alsamixer.
You will then get a graphic display of all your mixer settings. Make sure that there is "00" under each of the vertical bar charts and not "M"
"M" means that that channel is muted.
BTW if you want to experiment with running BIAB under Ubuntu, then you need to install WINE. This will then give you a pseudo C: drive and will let you run the BIAB .exe files and install onto that drive. You might have some problems setting up MIDI but it works for me.


tony
Lenovo lappie, 4Gb RAM, 500Gb HD
Ubuntu 12.04
Running BIAB under WINE