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Most sounds, especially music, are created by actions.
Therefore, the gestures of the musicians at the sound production have their
own visual lives.
Gestural Interfaces differ from traditional ones in that they cannot produce sounds by themselves. They
merely send signals that produce sounds by means of a computer or a sound module. They may
be regarded as an interface between the performer and the computer insofar as they translates
the energy derived from body movements into electrical signals.
These electrical signals can control physical musical instrument via electronic interface.
There are 3 simple intrumensts with electronic trigger interface:
- gong
- singing bowl
- water drop
EyeCon is an application designed to take real-time video image and convert it into midi
information.
This midi information controls an electromagnet for striking the bowl or gong with a soft mallet.
The same principle is used for water drop control with a valve.
Gesture can be triggered to start repetitive patterns, sequence, or complex texture with algorithm.
The relationship between gesture and interaction can be flexibly changed during the course of a
piece. The perception of interactivity can be integrated into a musical context. Gesture can be
clearly reflected to the acoustic property. For example, slow movement of body reflect lower
dynamic level, softer articulation, or slower tempo.
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