What is a harmonium?
A harmonium is a hand-pumped reed keyboard instrument. You press a key and squeeze the bellows — air flows past a small metal reed and vibrates it to produce a sustained, nasal tone. It arrived in India from Europe in the 19th century and stuck because that sustained tone matched the drone-based aesthetic of Indian classical music.
Today you'll hear it in bhajan and kirtan (devotional singing), qawwali, film songs, and Indian classical practice sessions. Most singers own one. The Web Harmonium gives you the same instrument — reeds and all — right in your browser.
The four things on screen
- Bellows (the pleated strip on top) — drag the handle left/right. Further right = louder. On a real harmonium this is how you keep the notes alive.
- Front panel — Drone on/off, Raga, Octave, Transpose, Reeds, Reverb, Notation. We'll use these below.
- Keyboard — tap keys with mouse, finger, computer keys, or a MIDI keyboard.
- Top-right utilities — preset songs, record, share, fullscreen, theme, keymap, sign-in.
Sargam: the Indian solfège
Western music labels notes C, D, E, F, G, A, B. Indian classical uses relative note names:
| Sargam | Western (in C) | Role |
|---|---|---|
| Sa | C | Root / tonic (the home note) |
| Re | D | Second |
| Ga | E | Third |
| Ma | F | Fourth |
| Pa | G | Fifth (co-anchor of every raga) |
| Dha | A | Sixth |
| Ni | B | Seventh |
Because sargam is relative, if you change the drone root to D, then Sa = D, Re = E, Ga = F♯, and so on. The web app handles this automatically — just look at where the gold ● marker appears on the keyboard.
Click the Notation button in the front panel to see sargam labels on the keys.
What is a drone, and why turn it on?
Indian classical music is built on a drone — a constant pair of notes (Sa and Pa) that plays underneath everything. It gives your ear a reference so every other note "makes sense" relative to it. Without a drone, you're just noodling; with one, you're practicing music.
In the front panel, set Drone → ON. Pick D as the root (common for practice; C also works). Choose Harmonium (sustained reeds) or Tanpura (plucked, evolving). Leave it running while you play.
Your first 5-minute practice
- Drone: ON, root D, type Tanpura.
- Raga: leave as Chromatic for now.
- Notation: click once to show Sargam.
- On the keyboard, find the gold ● — that's Sa. Press and hold it for 4 seconds.
- Go up: Sa → Re → Ga → Ma → Pa → Dha → Ni → Sa (upper). Each note 2 seconds.
- Come back down: Sa → Ni → Dha → Pa → Ma → Ga → Re → Sa.
- Repeat 5 times. Feel the tanpura pulling you back to Sa — that's the point.
Congratulations — you just did the fundamental exercise that every Indian classical student starts with.
Next: try a raga
A raga is a specific set of notes with its own mood and rules. In the Raga dropdown, start with one of these:
- Yaman — evening raga, Lydian-like, very uplifting
- Bhairav — morning raga, haunting, dignified
- Malkauns — late-night pentatonic, minimal and moody
- Kafi — light folk feel, used in lots of bhajans
When you select a raga, out-of-scale keys dim so you can only hit "correct" notes. Just noodle around — because every note is in the raga, you can't sound bad.
Keyboard map
| Computer key | Note |
|---|---|
| ` Q W E R T Y U I O P [ ] \ | White keys (C3 → B4) |
| 1 2 4 5 7 8 9 - = | Black keys |
| Space | Sustain (notes ring after release) |
| Alt + D | Toggle drone |
| Alt + ↑/↓ | Volume |
| Alt + [/] | Octave shift |
| Alt + Z | Record |
| Esc | Release all notes |
Common mistakes
- Skipping the drone. Indian music without a drone is like salad without dressing. Always leave it on when practicing.
- Mixing keys from different ragas. If you choose a raga, trust it — the dimmed keys are dim for a reason.
- Playing too loud. The harmonium's magic is in its midrange sustain. Pull the bellows back a bit; hear the overtones.
- Rushing. Indian classical values the held note. Sa for 8 seconds is a better exercise than scrubbing through the scale in 2 seconds.
Recording and sharing
Hit REC in the top-right. You can record up to 2 minutes per take. Stop and you'll see two options: Download saves a .webm audio file to your computer (keep forever), Save to cloud creates a public playback link that lasts 1 hour, perfect for messaging.
Cloud save requires a free Google sign-in.
Where to go next
- Look up Yaman alap on YouTube and try to trace the phrases on your harmonium. Start with the aaroha (ascent).
- Search for a teacher. This guide gets you playing, but Indian classical is an oral tradition — 1 hour with a real teacher is worth 10 hours alone.
- Buy a real harmonium (~$150 USD entry level) once you're hooked. The web version is your practice companion, not a replacement.