Prepared guitar

He has been known to employ objects such as a library card, rubber eraser, springs, hand-held electric fans, alligator clips, and common office supplies in playing the guitar.

Frith added an extra pickup over the strings at the nut, enabling him to amplify sound from both sides of the fretted note.

In this case an acoustic guitar was prepared with a certain type of a light bulb and produced synthetic - alike sound.

The beautiful demonstration of upper mentioned technique is the composition "Starshine ~" for violin, prepared guitar and percussion.

Yuri Landman derived a just intoned musical scale from an initially considered atonal prepared guitar playing technique based on adding a 3rd bridge under the strings.