Linux Audio Conference 2011
A position sensing midi drum interface
Andrew Baxter

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This paper describes my attempts at making a cheap, playable, midi drum interface which is capable of detecting not only the time and velocity of a strike, but also its location on the playing surface, so that the sound can be modulated accordingly. The design I settled on uses an aluminium sheet as the playing surface, with piezo sensors in each corner to detect the position and velocity of each strike. I also discuss the electronics (arduino based), the driver software, and the synths I have written which use this interface.

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