The Freesound Project is a collaborative database of Creative Commons licensed sounds. Freesound focusses only on sound, not songs
schöne spielerei in flash
supacool - making sound with the pen
Best catalogue of Linux Sound Software
Radical electronic music and sound art in the 21th century
The theory behind binaural beats is that if you apply slightly different frequency sine waves to each ear, a beating affect is created in the brain itself, due to the brain's internal wiring.
alesis io|2 usb soundcard unter liunx zum laufen bringen