Instructions for turning a mug of tea into a Theremin:
1 Prepare some tea
2 Expose the L/R leads on an 1/8" cable
3 Immerse leads in tea
4 Plug cable into audio input
5 Start up max/pd/processing/etc. and average every 735 samples (882 if you're in Europe/running on 50Hz)
6 Scale value and drive oscillator
(The tea should not be neglected, be sure to drink it once you're done making noise.)
My camera's been acting funny, hence the jitter.
See the Max patch for a more in-depth explanation: flickr.com/photos/kylemcdonald/2126494098/