"Last week we learned how to make simple video screencasts on
Linux with recordMyDesktop. Today we're going to record audio from
a microphone, get acquainted with JACK, and convert MyDesktop's Ogg
files into AVI formats.
"Even the most low-budget onboard sound chip should have a
microphone input. Plug in your mic, and then make sure it is
enabled in your mixer. If your system has only a single sound card,
enter hw:0,0 as the recording device in your recordMyDesktop
configuration. And that's all you need to do..."