Theremin

[petemoore]

  Timbre [Piaa] on this one changes the waveshape.
 Delays mixed with the original is the cool 'tracers'
tone it gets, the width between the source and delay playback
tones frequency intervals gets wider or almost matches if you hold real still, like a few alien landing ships playing a tune.
 Monophony and unchanging waveshape kind of beg for added 'feature' and delays, tremelo, anything.
 Dressed up, the pure tonal pitch variations and frequency intervals shifting around inbetween [add echo] can produce an alluring sound.