Sointu

About

Sointu is work-in-progress. It is a fork and an evolution of 4klang, a modular software synthesizer intended to easily produce music for 4k intros — small executables with a maximum filesize of 4096 bytes containing realtime audio and visuals. Like 4klang, the sound is produced by a virtual machine that executes small bytecode to produce the audio; however, by now the internal virtual machine has been heavily rewritten and extended. It is actually extended so much that you will never fit all the features at the same time in a 4k intro, but a fairly capable synthesis engine can already be fitted in 600 bytes (386, compressed), with another few hundred bytes for the patch and pattern data.

Sointu consists of two core elements:

A cross-platform synth-tracker that runs as either VSTi or stand-alone app for composing music, written in go. The app is still heavily work in progress. The app exports the projects as .yml files. A compiler, likewise written in go, which can be invoked from the command line to compile these .yml files into .asm or .wat code. For x86/amd64, the resulting .asm can be then compiled by nasm. For browsers, the resulting .wat can be compiled by wat2wasm.

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