Plugins in subdirectory `./plugins` have been derived from source files from https://github.com/Befaco/Noise_plethora/ (prefix `P_*.hpp`) licensed under GPL-3.0-or-later (see https://github.com/Befaco/Noise_plethora/blob/master/README.md). 

The audio components in subdirectory `./teensy` include modified versions of the [Teensy Audio library](https://github.com/PaulStoffregen/Audio), licensed under the MIT License.
