Web Harmonium - Free Online Virtual Harmonium

A free, browser-based virtual harmonium keyboard for practicing Indian classical music. Play authentic harmonium sounds with Sargam notation (Sa Re Ga Ma Pa Dha Ni) support - no download required.

Features

Musical Capabilities

• Authentic Sound - Sampled from a real Kannan harmonium with natural reverb
• Indian Classical Notation - Toggle between Western (C D E) and Sargam (Sa Re Ga Ma) notation
• Three Octaves - Full C3 to C6 range covering all practice needs
• Transpose Control - Shift pitch to match your vocal range
• Additional Reeds - Layer multiple reeds for richer sound
• Adjustable Reverb - Control room ambience depth

Practice Tools

• Scale Patterns - Practice Sa Re Ga Ma, Arohan, Awarohan patterns
• Demo Songs - Learn with built-in song practice mode
• Custom Notes - Load your own notation and lyrics
• Visual Feedback - See which notes to play with key highlighting
• Pitch Visualizer - Real-time waveform display

Input Methods

• Computer Keyboard - Full keyboard mapping with on-screen hints
• Mouse/Touch - Click or tap keys directly on screen
• MIDI Support - Connect USB or Bluetooth MIDI controllers
• Mobile Optimized - Touch-friendly interface for phones and tablets

Additional Features

• Metronome - Built-in BPM control (40-200 BPM)
• Light/Dark Theme - Comfortable viewing in any environment
• Keyboard Shortcuts - Fast control changes during practice
• Responsive Design - Works on laptop, desktop, tablet, and phone

Keyboard Mapping

White Keys (Shuddha Notes)

Sargam:  Ṃ  Ṃ  P̣  Ḍ  Ḍ  Ṇ  S   R   G   M   M   P   D   D   N   N   Ṡ   Ṙ   Ṙ   Ġ   Ġ   Ṁ   Ṁ   Ṗ
Key:     s  a  `  1  q  2  w   e   4   r   5   t   y   7   u   8   i   9   o   p   -   [   =   ]   \   '   ;
Western: F3 F#3 G3 G#3 A3 A#3 B3 C4 C#4 D4 D#4 E4 F4 F#4 G4 G#4 A4 A#4 B4 C5 C#5 D5 D#5 E5 F5 F#5 G5

Black Keys (Vikrit Notes)

Use the number row for sharps and flats.

Practice Mode

Scale Patterns

• Sa Re Ga Ma - Basic ascending scale
• Sa Ni Dha Pa - Descending pattern
• Arohan - Full ascending scale
• Awarohan - Full descending scale
• Basic Alaap - Improvisation foundation

Demo Songs

Practice with built-in Indian classical songs with step-by-step guidance.

Custom Notation

Load your own notation with lyrics:

(FD#C#D#) F~~ | (F D# C# D#) F~ D#~~
Pehle  bhi  main | tumse   mila       hoon

MIDI Setup

1. Connect your MIDI keyboard via USB or Bluetooth
2. Click the refresh button in the MIDI controls
3. Select your device from the dropdown
4. Start playing - MIDI notes map directly to harmonium keys

Compatible Devices: All standard MIDI controllers (25-key, 49-key, 61-key, 88-key)

Browser Support

Browser	Support
Chrome	Full
Firefox	Full
Safari	Full
Edge	Full

Requires Web Audio API support (all modern browsers).

Technical Details

Audio Engine

• Sample Source - Real harmonium recorded in controlled environment
• Reverb - Impulse response-based convolution reverb
• Latency - Local processing via Web Audio API for minimal delay
• Pitch Shifting - Real-time sample pitch adjustment across octaves

APIs Used

• Web Audio API - Audio playback and processing
• Web MIDI API - External controller support
• Canvas API - Pitch visualizer rendering

License

This project is licensed under the MIT License - see the LICENSE file for details.

Acknowledgments

• Original concept by Rajaraman Iyer
• Harmonium samples recorded from a Kannan harmonium
• Built with love for Indian classical music community

Contact

• Developer: Himanshu Dubey
• GitHub: github.com/himubey

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Made with care for musicians learning Indian classical music.