PLY - TheTechnobear/SSP GitHub Wiki
Overview
polygon oscillator - self modulating waveforms. useful as an audio oscillator, or as (up to 4) lfo for modulating other modules.
Documentation
- Wiki - https://github.com/TheTechnobear/SSP/wiki/WTO
- Forum - https://forum.percussa.com/t/polygon-oscillator
Parameters
| Name | Desc |
|---|---|
| Coarse | coarse tuning in hz |
| Fine | fine tuning in hz |
| X | position across spheres |
| NrOsc | number of oscillators these are slighly detuned by spread |
| Spread | detuning amount between oscillators |
Inputs
| Name | Desc |
|---|---|
| Pitch | pitch in v/oct |
| Spread | detuning of oscillators, see NrOsc |
| X | position across spheres |
| Freq | frequency in hz |
| Amp | signal amplitude |
| Sync | sync oscillators |
Outputs
| Name | Desc |
|---|---|
| R | red output, amount of red at X |
| G | green output, amount of greed at X |
| B | blue output, amount of blue at X |
| SUM | sum of RGB, AC coupled |
Notes
The polygon oscillator creates a waveform based on 'slicing' the image at X, and looking at the colours at this point. in a sense, its very similar to a wavetable oscillator, but based on a 3d model. i.e the image you are seeing on the SSP screen. tech note: its using an openGL shader for this, so its a 3d model thats being used :)
in the current implementation we can see two spheres, with a two light source on each, that are moving. therefore, changing X means we get different waveforms... however, due to the light source movement, even a static X still has a changing waveform. note: the sphere on the left is cyan, so you will get a mixture of green and blue from it.
the outputs, we can get the red, green and blue components and also the sum of these, so R+G+B the sum is essentially 'brightness', and is the most suitable if you want a quick audio oscilattor, that self modulaing. the RGB outputs are useful as external modulators.