A newly developed software called BillaBoop, and here's what the creator has to say:
"BillaBoop is a real-time audio driven drum controller which allows the user to control up to 3 drum instruments. The user can control any drum synth with the voice (beat box), or any object or musical instrument. Unlike other audio-driven systems which require a lot of parameter tuning to be able to discriminate the sounds you are playing, BillaBoop incorporates an efficient Machine Learning component which enables the system to learn by demonstration."
[Resource http://createdigitalmusic.com/2007/02/23/play-drums-with-sound-via-software-that-learns-from-you/]
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