GMS A Gestural Music Sequencer developed by John Keston
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GMS Tags

music audio sequencer audio editor probability distribution Gestural Music Sequencer

GMS Description

A Gestural Music Sequencer developed by John Keston The GMS application exemplifies different types of videos and displays them either normally or inverted so they look as though you were looking at the notes into a mirror. Each frame is analyzed for brightness, then the X and Y data of the brightest pixel is converted into a MIDI note. The X axis is used to select a pitch, while the Y axis determines the dynamics. As users move, dance, gesture, or draw in front of the capture device, notes are generated based on a predetermined scale. Currently the available scales are pentatonic minor, whole tone, major, minor, and chromatic, all of which can be dynamically selected during a performance.The scale can also be adjusted using probability distributions. Each note in the twelve tone chromatic scale can be given weighted randomness from zero to one hundred. Notes set to zero will not play, and notes set to one hundred are most likely to play when the probability distributions are enabled.Other dynamic controls include MIDI out channel, BPM, low and high octave, transposition, sustain, duration selection (manual or randomized with probability distributions), BPM adjustment, and note randomization. A “free” mode allows the durations to be manipulated by the mean brightness of the video input. Finally, four, simple video filter presets were recently added that can be applied by pressing shift + . The application works especially well in dark lighting while using a light source to control the sequencer.

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