A Rust implementation of the Freeverb algorithm.
Freeverb was originally written in C++ by "Jezar at Dreampoint", and was released into the public domain in June 2000. It is now widely used in various incarnations in multiple software packages.
This implementation of Freeverb in Rust is an almost direct conversion of the original source, created as a demonstration project for a talk I gave about Rust at the Audio Developer Conference 2018.
There are a couple of (intentional) differences to the original implementation:
- delay line buffers are dynamically allocated for simplicity. This may have a performance impact, and once generic constants are available I would like to make the buffer static.
- 64 bit processing is used internally whereas the original is 32 bit. I might make the sample type configurable at some point, but for now 64 bit processing seemed like a sensible default.
freeverb/
This contains the core implementation of Freeverb, with a simple interface.
app_gtk
A very basic audio+GUI application that runs the freeverb::Freeverb processor.
You will need portaudio and gtk installed on your system for this to work.
audio_module
This contains a (very) experimental generic module+parameter library, which I really only added as an excuse to explore approaches to polymorphism. The audio_module approach is currently only used by app_gtk, it might go away in the future, or maybe I'll decide I like it and continue to work on it. At this point I don't know!
freeverb_module
The freeverb processor wrapped up as an AudioModule, currently only used by app_gtk.
app_juce
A very basic JUCE application that runs the freeverb::Freeverb processor via a statically linked library.
clib
A static library that provides C bindings to the freeverb::Freeverb processor, used by app_juce.
wasm
A library that provides a wasm-bindgen interface to the freeverb::Freeverb processor.
Also in the folder is a small web application that runs the wasm processor.