Apache-2.0 · Dependency-free C++ core · WebAssembly
Analysis, mastering, mixing, built-in instruments and a DAW runtime — one C++17 engine, running natively and in the browser. Same results either way, and nothing is uploaded.
Try it locally
Every demo runs the same Apache-2.0 processors locally in your browser via WebAssembly.
Audio player with real-time chroma & spectrum visualization.
Hit streaming loudness targets with presets. WAV export.
Structure, harmony, melody, loudness, and spectral views.
Up to eight stem tracks with scene JSON and WAV bounce.
Local microphone voice changer with library character presets.
Estimate room geometry, reverb, and source distance in 3D from a recording.
Play the built-in polyphonic synth from your keyboard or a USB MIDI keyboard.
Step-sequence three tracks, mix them, and bounce the loop to WAV.
libsonare's built-in synth and SoundFont engines render single-track MIDI on-device — practice with falling notes, a lit keyboard, and MIDI scoring.
Sixteen parts, a sound each, one insertion effect — and your own .mid played through it, with every SysEx byte shown.
A sixteen-step monophonic bass machine: one oscillator, a diode-ladder lowpass, and per-step accent and slide.
LIVE FULL DAW · LIBSONARE AUDIO ENGINE
A full DAW in your browser
A complete client-side workstation: sequencing, piano roll, score engraving, a mixer, mastering, and WAV/MP3/MIDI/MusicXML export. libsonare is its audio engine — playback, mixing, mastering, the built-in instruments, and WAV/MP3/MIDI export — while score engraving, MusicXML, and music theory come from separate libraries. It shows how far the audio engine reaches inside a real DAW.
Hosted live demo · source not public · not a production product.
sonare-studio.libraz.net
Use it in your code
import { init, detectBpm, detectKey, analyze } from '@libraz/libsonare'
await init()
const bpm = detectBpm(samples, sampleRate)
const key = detectKey(samples, sampleRate) // { name: "C major", confidence: 0.95 }
const result = analyze(samples, sampleRate)What ships in the box
Checked by a build: librosa parity against reference values, and each runtime’s reach against the C ABI itself.
Waveguide piano, bowed strings and reeds among them. The data-free GM/GS fallback voices all 128 programs, and its behaviour follows an open archive of hardware tone-generator measurements.
The mixing and mastering assistants hand back a scene or a chain with the reason behind every change. Rule-based — no trained model, no upload — and applying the result stays your decision.
88 DSP processors built against published references, starting with BS.1770-4 loudness and true-peak limiting. 73 of them drop straight into a realtime chain.
BPM, key, chords, sections, EBU R128 loudness. Where it overlaps librosa the defaults match, and CI checks them against reference values. The results feed the headless DAW and the realtime engine directly.
C++, C, Python, Node, WASM and two CLIs under one Apache-2.0 license. How far each runtime reaches is published as a table.