This is a work in progress…
The balloon drum is a 3″ sewer pipe with a balloon membrane head. The head is struck with a short rubber covered mallett. This version is a single 48″ model, sampled and manipulated with Csound. Also on the track are finger piano, flutes, oboe, and guitar. The notes are the otonality on C. 8:9:10:11:12:13:14:15:16. More later.