Web Harmonium Pro · Open Core

Browser Harmonium Workbench

Play with keyboard, mouse, touch, or MIDI. The full Warm Harmonium v5 feature set is preserved here, but the surface is rebuilt around a centered stage, live notation rail, and calmer control layers.

🎹 MIDI Support 🎼 9 Raga Presets ⏺ Piano Roll 🌊 Waveforms 🔁 Drone Mode

Best with Chrome/Edge · Use headphones · Esc opens shortcuts

Web Harmonium Pro

Play harmonium online free with MIDI, touch, mouse, or keyboard in your browser.

Key: C Oct: 3 Vol: 30%

Ready • 𝅘𝅥𝅰

SUS ● REC

VOL Volume Alt + Up/Down

30% Output level

REV Reverb Ctrl + Alt + R

Off

Room ambience

MIDI MIDI External input

Scanning

TR Transpose Ctrl + Alt + Left/Right

Semitone

OCT Octave Ctrl + Alt + Up/Down

1-5

Middle

RD Reeds Ctrl + Alt + Plus

Layers

Pure

Waveform

Envelope

Attack

Release

Fine Tune 0¢

Drone

Scale

Sequence Player ▶

Gap 180ms Hold 200ms

Loop

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🎹 Keyboard Reference