maks/dart_synth

A sandbox for audio synth experimentation in Dart.

The current plan is to create enough infrastructure to run WASM code from Peter Salomonsens awesome AssemblyScript based synth.

TODO

• Playback using Dart on Linux via Libao (using Pulseaudio on Ubuntu)
• Playback sine wave test tone using AssemblyScript ported to Dart
• Call wasm (AS compiled to wasm from @petersalomonsen repo) from Dart using upcoming wasm package via FFI
• interface to all "low-level" synth1 classes (oscillators, envelope, etc)
• interface to fx classes
• interface to "instruments" defined based on lowlevel synth classes

Example

run to get sawtooth tone at 440hz playing for 1 sec:

dart example/osc_example.dart

to play a sawtooth tone with a given midi note for 1 sec:

dart example/osc_example.dart 33

to play a sawtooth tone with a envelope applied for 3 sec:

dart example/env_example.dart

Note: the wasm oscillator classes currently expect a wasm file called osc.wasm to be located in the same folder as the dart script being run, eg. osc_example.dart.

AS Audio WASM

The wasm file osc.wasm used by dart-synth comes from the AssemblyScript Audio project.

Status

Currently only basic sine/sawooth tone playback on x86 Linux (under PulseAudio) works, see above Todo list for planned future features.