Rock into the future with the "Cosmic Rocker" alert sound, a hi-fidelity stereo recording of a space age-sounding electric guitar. The guitar plays a 3-note upward scale progression with a wah effect and subtle stereo delay, creating a short, attention-grabbing sound.
The "Cosmic Rocker" alert beep is available in both 16-bit/44.1kHz and 8-bit/22.5kHz versions and can be downloaded here or at the Clixsounds web site along with tons of other free Mac sounds.
Download the sound from the Clixsounds web site. When you arrive at their site, click on the "Sounds" button on the left.