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Rider 1: Y tilt + acceleration signals start of next note event and Y tilt + deceleration (or also distance off the ground from the optical sensors or 180 turn on the X axis) signals a note ending. Pitch/harmony is predetermined within general ranges and notes simply step through lists. Speed maps to different LFOs frequencies which in turn map to a micro loop’s start position, loop length, panning, filters, amplitude and pitch-bend, creating a synth-like stretching sound. By ‘riding’ or affecting in realtime a frequency of the oscillator that modulates the various integral parameters that create the sound, the metaphor of surface tension is continued in the architecture of the sound itself.
Rider 2: Note beginnings, endings are similar for all boards. In this case Rider 2 triggers additional percussive sounds when board is still and horizontal on edge of ramp.
Rider 3: Simile...
Rider 4: In this case the pitch bending parameter is quite extreme, creating a scratching kind of effect.