Radian uses a bank of harmonic oscillators to render up to 256 partials of an ideal 2D circular membrane. The membrane is coupled with an air resonance and a rudimentary rim resonance model consisting of eight partials.

The timbres of acoustic drums vary widely from the ideal form. Radian produces sounds that are reminiscent of single membrane percussion instruments and is best enjoyed as an abstract because of the simplified and generalised parameterisation.

The modeled instrument is mono-timbral and does not track the keyboard. Pitch bend is used to modify striking position.

The demo version is limited by an intermittent noise.