slat (nee "theremin") makes theremin-like sounds. It's only been a few days, but slat now has a better name, and much better sound. It also does tremolo and vibrato. See the commandline options for adjusting it. Info and download: http://dis-dot-dat.net/index.cgi?item=/code/slat/ Sample of the new sound: http://dis-dot-dat.net/content/code/slat/newsamp.ogg Have fun. James -- "I'd crawl over an acre of 'Visual This++' and 'Integrated Development That' to get to gcc, Emacs, and gdb. Thank you." (By Vance Petree, Virginia Power)