Web
Harmonium_
A digital harmonium built for Indian classical music. Real harmonium samples, MIDI support, and Carnatic notation — all in your browser.
Everything you need to play.
Web Audio Engine
Real harmonium sample with pitch-shifting synthesis. Authentic sound powered by the Web Audio API with convolution reverb.
MIDI Support
Connect any MIDI keyboard for a natural playing experience. Auto-detects devices and maps notes instantly.
Indian Classical Notation
Full Carnatic swaram display - Sa, Re, Ga, Ma, Pa, Dha, Ni. See the notation as you play each note.
Keyboard Control
Play using your computer keyboard. Intuitive key mapping covers over two octaves of notes.
Transpose & Octave
Shift pitch by semitones (-11 to +11) and switch octaves (0-6). Find the perfect key for any raga or song.
Multi-Reed Stacking
Stack up to 6 additional octaves to simulate a real harmonium's multi-reed configuration for richer sound.
The Harmonium.
The harmonium is a keyboard instrument widely used in Indian classical music, devotional music (bhajans), and Carnatic and Hindustani traditions. Originally from Europe, it was adopted and adapted in South Asia where it became central to musical practice.
A real harmonium works by pumping bellows with one hand while pressing keys with the other. Air flows through metal reeds to produce sound. Different stops and reed configurations create varying timbres.
This digital version faithfully reproduces the harmonium sound using a recorded sample with real-time pitch shifting. It supports the full range of notes used in Indian classical music, complete with Carnatic swaram notation.
Ready to play?
No installation needed. Open the harmonium and start playing instantly in your browser.