Peter Knight from the Tinker.it crew demonstrating the Auduino.

The Auduino is a sound synthesiser based on the Arduino platform. It uses granular synthesis techniques to generate a distinctive filter-sweep sound.

Sound is generated by playing the same noise (‘grain’) repeatedly at very high speed. This merges into a tone that is an audible hybrid of the repetition rate and the original grain. It sounds quite similar to an oscillator with two resonating bandpass filters, although the different architecture means there are lots of additional interesting noises at parameter extremes.

The grain consists of two triangular waves of adjustable frequency, and adjustable decay rate. This is based on FOF synthesis model, but using triangle waves instead of sine and using a rectangular window.

The repetition rate is set by another control.

Recorded at the H3 pubmeet, London – December 16, 2008