Though the UI is fairly complex, the audio aspect is relatively simple. Each shape represents one oscillator set to a certain frequency (which bar it is on) and a waveform (what kind of shape it is). The horizontal motion corresponds to a vibrato effect and the spin corresponds to a panning effect.
In Max I started by creating multiple oscillators set to the harmonics of the fundamental. The volume, wave type, cutoff frequency, and vibrato depth and rate are all manually adjustable. These parameters will eventually be controlled by the custom UI.
The main synth contains 6 harmonics routed through an ADSR envelope.
Each oscillator contains logic for modulating the pitch (vibrato) as well as a filter and selector to switch between wave types.