Gongs can play themselves!

The composer Jay Schwartz made an interesting discovery 20 years ago. You can get a gong to vibrate without even touching it. He does this by putting it into a feedback system so that the gong essentially plays itself. Here are some links to Jay's music:    • Schwartz - Theta | Teodor Currentzis | SWR...     / passacaglia-music-for-orchestra-ix-2024   https://www.jayschwartz.eu/