About Helix Composer
Helix Composer is a free online music composition and orchestration tool that runs entirely in your web browser. It supports Chinese traditional instruments (erhu, guzheng, pipa, dizi) and Western orchestral instruments (piano, violin, cello, harp, flute, clarinet, trumpet, guitar).
Features include a multi-track piano-roll sequencer drawn on HTML5 Canvas, real-time audio playback via Web Audio API and Tone.js, a per-track mixing console with volume, pan, reverb send, and mute/solo controls, MIDI file import and export, customizable piano keyboard with sustain and recording, and demo presets including a String quartet, Chinese ensemble, and Flute Harp Piano arrangement.
Helix Composer supports English and Chinese (simplified) interfaces and offers seven visual themes: Midnight, Aurora, Warm Studio, Oceanside, Retro Wave, Royal, and Paper.