I got an Alesis AirFX controller. It lets me add envelope shifts and all sorts of other cool FX to my music!
The best part is: no knobs or slide switches to twiddle! This thing uses an IR sensor to change the FX according to the movement of one's hand.
It is sweet! I'll record some samples later.

Okies. I got the sample uploaded. Normally, it would just be a constant tone

It's a sawtooth wave 'c'

all the sounds after the record scratching do not require external input.

It's a 3.5 MB 128kbps mp3 file. Enjoy! http://www.scifi-pics.com/Envelope_experiments.mp3

Special thanx to Pic-A-Card for letting me use his server.

I am d/l your sample to check out now. I had thought about getting one of those but the thing that bugged me the most about them was the RCA jacks for DJ use. I much prefer the 1/4' jacks even though I know you can get cables that go from RCA to 1/4'. I had seen a hard rock band use a theramin once and it was really cool in a couple of their songs so that got me interested in the AirFx thing... plus I see they have a synth with the same type of control as well.

Well, according to my source, Alesis chapter 11-ed, and there's talk of a takeover, so chances of finding one of their Airsynths are pretty slim. This AirFX was one of only two the guy had left.

This combined with an Airsynth would be an amasing instrument. Pitch control with one hand, envelope with the other.... That's good stuff, matey. ^_^

I have both pieces. Alesis may have been slow getting back up to speed after chapt.11, but they are still alive and kickin'. The Air Synth started shipping about a month ago - it's not quite the same as a Theremin (I have one of those too) but a very cool gadget in it's own right.

Scott