MIDI controller setup for online harmonium practice

Beginner · ~6 min

Why use a MIDI keyboard with an online harmonium?

The on-screen harmonium works fine with a mouse or QWERTY keyboard, but neither matches the feel of pressing real keys. A USB MIDI controller gives you:

• Velocity-independent tone (matches a real harmonium — no accidental dynamic swells)
• Full polyphony without struggle (drone Sa with one hand, melody with the other)
• Multi-octave range in your hands rather than relying on octave shift buttons
• Muscle memory that transfers directly to a physical harmonium when you eventually buy one

Hardware recommendations

You don’t need an expensive controller. The cheapest 25-key MIDI keyboards (around $50/₹4,000) work perfectly. For Hindustani practice, look for:

• 49+ keys — a 25-key model is enough for one octave + some flex, but two octaves (49 keys) covers 95% of raga work
• No weighted action — harmonium keys are spring-loaded with very light resistance; cheap MIDI keys are actually closer to the real feel than premium weighted controllers
• USB-class compliant — the keyboard should work without driver installation on Chrome/macOS/Windows. All major brands (Akai, Arturia, M-Audio, Novation, Korg) ship class-compliant devices.

Browser-side: Web MIDI permission

When you first open a page on this site that uses MIDI, your browser will prompt:

“playharmoniumonline.com wants to control your MIDI devices.”

Click Allow. The permission is stored per-origin, so you only do this once per browser. If you accidentally click “Block”, you can re-enable in your browser’s site settings:

• Chrome: Settings → Privacy and security → Site settings → MIDI devices
• Edge: Settings → Cookies and site permissions → MIDI device control
• Firefox (Android only): about:config → dom.webmidi.enabled

Multiple MIDI devices

If you have more than one MIDI device connected (e.g., a keyboard and a drum pad), our MIDI test tool lets you select which device feeds the harmonium. Use the dropdown above the keyboard.

Common controllers and their quirks

• Akai MPK Mini — works flawlessly. Octave buttons map to ± one octave, sustain via mod wheel.
• Arturia MicroLab — works flawlessly. The included Arturia Lab software is unnecessary for browser use.
• M-Audio Keystation — works flawlessly on USB. Pitch wheel is detected but ignored by our harmonium (no pitch bend on a real harmonium).
• Korg nanoKEY2 — works flawlessly. Velocity is sent and ignored by our harmonium engine.
• Novation Launchkey Mini — works, but the pad layout is irrelevant for harmonium use; treat it as a 25-key keyboard.

What if I don’t have a MIDI keyboard?

Use the QWERTY mapping built into our keyboard widget:

QWERTY key	Note (Sa = C4)
Z	C (Sa)
X	D (Re)
C	E (Ga)
V	F (Ma)
B	G (Pa)
N	A (Dha)
M	B (Ni)
,	C5 (Sa^)

Black keys map to the row above (S, D, G, H, J for the sharps). The Q-row plays the upper octave. This works in any modern browser without permissions.

Steps

FAQ