Knyst

Knyst is a real time audio synthesis framework focusing on flexibility and performance. It's main target use case is desktop multi-threaded environments, but it can also do single threaded and/or non real time synthesis. Embedded platforms are currently not supported, but on the roadmap.

The name

"Knyst" is a Swedish word meaning very faint sound. It is normally almost exclusively used in the negative e.g. "Det hörs inte ett knyst" (eng. "You cannot hear a sound"), but I think it's well worth some affirmative use.

Features

good runtime performance
interopability with static Rust DSP libraries e.g. dasp and fundsp (they can be encapsulated in a node and added to the graph)
real time changes to the audio graph
sample accurate parameter changes
graphs can be nodes and changes can be applied to graphs within graphs at any depth
feedback connections to get a 1 block delayed output of a node
any number of inputs/outputs from a node
choose your level of flexibility and optimisation: create a graph with lots of interconnected nodes or hard code it all into one node when you need more performance

Safety

Knyst uses a little bit of unsafe under the hood to improve performance in the most sensitive parts of the library, as do some of its dependencies. The user, however, never needs to write any unsafe code.

Roadmap

Vision for the future

sample accurate node addition to the graph
sample accurate connection change to the graph
automatic parameter change interpolation
automatic GUI generation from the graph incl. interactively changing connections and parameters
parallel processing of large graphs
automatic sample rate conversion
allowing graphs with differenc block sizes using automatic buffering
support no_std for embedded platforms

License

Licensed under either of Apache License, Version 2.0 or MIT license at your option.