THE OPEN MUSIC ROOM

Play harmonium online.

Choose instrument

Touch

Soft sounds warmer. Bold sounds brighter.

Choose Play to tap or glide across the instrument. Choose Rotate to change your view. Use Play close-up for larger playing surfaces. The note controls below also work with your keyboard.

Your keys. Your rhythm.

Press two or more keys together for a chord.

←→ switch instrumentesc stop sound

All 37 pitches Tap to play the full 3D range

Playing preferences

Instrument volume

Try a tune

Hear it on harmonium, then make it your own.

8 demo tunes

Keep the beat

Set your tempo and play along.

96 BPM

The click is for practice and is not included in recordings.

PLAY. EXPLORE. REPEAT.

A closer look at the harmonium.

Guide updated 12 October 2026

Play a free online harmonium with 37 playable 3D keys and sampled reed tones. Hold chords, explore melodies, record, and export your music.

Explore 37 chromatic 3D keys from C3 to C6, or choose Classic for the original 24-note C3–B4 keyboard. Hold notes together for sustained reed chords, or begin with a small melody.

Play your next note

How do I play the online harmonium?

In 3D view, choose Play to tap, strum, or glide across a playing surface. Hold keys or wind surfaces to sustain a note. Choose Rotate to inspect the model; scroll or pinch to zoom. Use the labeled note controls or computer keys for chords and the full range. Classic view provides the original illustrated playing surface. Click or touch the illustrated keys, or use the labeled keyboard shortcuts. Hold several keys for a chord. The bellows animate as notes play; no manual pumping is required. The stops are decorative.

What sounds does the virtual harmonium use?

Harmonium recordings by Donya Quick, distributed in the tonejs-instruments sample library, supply the reed sound. Samples are transposed and looped while notes are held. Source and license details are in Audio attribution.

Audio & tune credits

TRY IT. LISTEN. MAKE IT YOURS.

Keep a low note under a moving line

Hold C3 while a higher note changes above it. This explores independent sustained voices in the virtual reed keyboard without manual bellows control.

Starting tempo: 60 BPM. Use Keep the beat for a steady pulse.

1C3 + E3
2Hold both
3C3 + F3
4Hold both
5C3 + G3
6Hold both
7C3 alone
8Release and rest

Find the foundation and melody
Z plays C3. C, V and B play E3, F3 and G3. Start Keep the beat at 60 BPM; touch users can hold the labeled controls with separate fingers.
Keep Z held
Press Z and C together on beat 1. Keep Z down while replacing C with V on beat 3, then replace V with B on beat 5.
Let the foundation finish
Release B on beat 7 so only C3 remains. Release Z for beat 8, then repeat after the gap.

Try next: Reverse the upper line: G3, F3, E3. Keep each upper note for two beats over the same held C3.

How do I record the harmonium in Resonant?

Choose your playing controls
Choose Play in 3D view or switch to Classic. Tap a playing surface, use the labeled note controls, or press a computer-key shortcut to enable sound.
Record your idea
Press Record above the instrument, then play your phrase. This records studio audio without using your microphone. Each take can last up to five minutes.
Listen and keep a copy
Press Stop, open Recordings, and listen to the take. Choose Download WAV or Original audio to keep a file. Saved takes stay on this device; clearing browser storage removes them.

A few useful notes about the harmonium

Do I need to pump the harmonium bellows?

No. Hold a playing key or a labeled note control to sustain the reed sound. Classic view includes a bellows animation; it does not control the audio.

Can I play harmonium chords and change the stops?

Hold Z, C, and B for a C3–E3–G3 chord, or press several labeled note controls. Classic view also supports multi-touch on the keys. The illustrated stops are decorative and do not change the sound.