SPP is a harmonic oscillator written in SuperCollider. By default it will play 128 partials. It creates a wavetable once the amplitudes of the partials are set to minimize the CPU load. It has a QT GUI, several modes for setting the amplitudes array, and a built in reverb. It speaks OSC.

It looks like this :

Just run the spp.scd file from your SuperCollider interpreter and it will handle importing the other files.

Everything you need to customize your instance can be found in that same file.

The modes are used to create arrays of amplitudes for the partials. There are seven modes and each one has a different set of parameters. A mode is selected by clicking on one of the buttons at the top of the controls section of the GUI. The controls for that mode is (are) the one(s) immediately below the mode button (and up to the next button in the case where there are multiple controls).

A linear ramp that starts at an amplitude set by start and moves up or down each step by a value set by step.

Implements the formula: 1 / ((i+1) ** k) with k set by k.

Implements the formula: 1 / (i ** k) with k set by k.

Formant-like structure with a center partial and a spread set by width.

Partials starting on the partial set by start and spaced out from each other by space partials.

Maximum amplitude for all partials up to the cutoff partial set by n.

Partials from start to end ramp from an amplitude set by slevel (start level) to another set by elevel (end level). Note that amplitudes are normalized, so the result might not be exactly what you would expect.

There must be an easter-egg to do just that...

By default, SuperCollider will be listening on localhost:57120.

There are issues I'm working on. You can help if you're up for it. You can find them here.