My desktop pc's front audio out sometimes (depending on the wifi connection) makes various sounds, which i tried to record. . . Not sure i was successful. :).
This sounds are created by me with synthesizer. Very similar to star trek computer sounds. If you need music or sounddesign check : www. Robertoignis. Com.
Power switch is pressed, computer starts up, plays a sound effect through the internal speaker, power switch is pressed again and the computer shuts down. Recorded with a zoom h4n, placed inside the computer.