I’m running Audacity 1.3.4-beta in Ubuntu 8.04 (Hardy Heron). Every time I try to record, I get the following error:
> Error while opening sound device. Please check the input device settings and the project sample rate.
To fix this (and allow me to record) I open the System Monitor, locate the `jackd` process and end it (don’t kill it, otherwise you’ll kill Audacity too). Recording will then work.
You’ll need to do this each time you start Audacity.
Alternatively, you can install 1.3.6 from getdeb which seemed to work for me.