Direct sound recording software that can be used in Linux (tested in Ubuntu 9.10)
- Audacity (sound recorder and sound editor)
- VLC
- Sound Recorder
- arecord
If your sound card has multiple input and output modes like mine does (analog, digital, , duplex, etc), you might have to make some changes in your sound preferences. In Ubuntu 9.10 right click on the speaker icon in your panel, select the "Sound Preferences", then select the "Hardware" tab. Choose a device to configure and change its settings.