This is an example of running a spring-mass simulation on the GPU and using it as a foundation for sonification in TouchDesigner. The spring system is based on an example by Paul Bourke with additional impulse and anchor forces added.
Each spring connects to its neighbor horizontally to create a group of strings. The number of strings is controlled by the height of the texture. The difference between a string's current position and its rest position becomes a waveform which is oscillated at audio rates to produce sound. Frequencies are mapped to notes with A4 = 440Hz. The x and y axes map to the left and right channels. Mouse velocity is used as the impulse force.
Different kinds of attack/decay/sustain/release envelopes can be derived by adjusting the impulse, anchor, and drag forces on the glsl_spring_system node.
Spring-Mass-Sonification code is released under the MIT License.