I just bought a very cheap, old, dutch-made D&R stereo spring reverb from the 'bay. It's a bit noisy, but sounds cool. This evening I took the top off, started twanging the springs and made this small, clangy sample pack for the Freesound Project, who are now getting close to 10,000 sounds and 1 million downloads.
Posted by Tom Whitwell.
Try spring reverb in a feedback loop (use mixer aux send back into a channel with EQ then send it back on itself..) -- when its howling start using your fingers to deaden the springs -> you can then kind of move your fingers to different harmonics points and it sounds damn fine and is mighty fun to play with. BUGS