Cnoidal is a Haskell library for representing, transforming, and live coding music.
The library is based on the notion of temporal media, a data type that represents a collection of time intervals tagged with values. It supports various functor instances, like Applicative Functor, which are highly useful for live coding.
A first version of the library is presented at the FARM 2019 workshop at the ICFP 2019 in Berlin.
The name is inspired by the cnoidal waveform, a nondispersive shape that water waves can take.
By itself, the Cnoidal.Player module only allows you to output MIDI messages. You will need a MIDI instrument to actually hear sound. However, you can find many software instruments on the internet. On the open source side, you can use
- fluidsynth — a synthesizer that uses Soundfonts.
- csound-expression — a Haskell library that wraps the Csound language.
On the commercial side, you can use most digital audio workstations (DAW) or a performance-oriented application like MainStage.