MIDI Graph

A standalone audio engine written in Rust.

Features include:

• Cross-platform, including Web, thanks to the cpal crate
• Play MIDI events either from .mid files or manually send them through an async channel
• Shape sound using a node graph, assembled from included tools such as chiptune generators and sample file loaders (.wav and .sf2 files are supported)
• Load node configurations from .ron files or write them in Rust code
• Some basic effects included, such as volume (ADSR) envelope

Examples

cargo run --example <example-name>

Various examples are included, testing various features:

• async to test manually-generated MIDI events without loading a .mid file
• chip to test some of the basic audio generators and effects on a melody from a .mid file
• looping to test a .mid file containing cue points, as well as controlling using manual async events
• programs to test storing multiple programs in the BaseMixer's and changing during playback
• ron to test loading and using a node graph from a RON file (which also specifies a .mid file to play)
• sf2 to test loading a soundfont from a .sf2 file and applying it to a melody from a .mid file

Testing

For the host desktop platform:

cargo test

For WebAssembly:

./wasm-prepare.sh if never run before, then ./wasm-test.sh

Running WebAssembly Demo

./wasm-prepare.sh if never run before, then ./wasm-run.sh