Free harmonium and Hindustani practice tools — a 2026 roundup

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There has been a quiet explosion of free, web-based Hindustani practice tools in the last three years. Browser audio (Tone.js, Web Audio, Web MIDI) has caught up to native apps, and a handful of focused builders have shipped genuinely useful tools that don’t cost anything. Here’s the landscape as it stands in April 2026.

What “free” actually means here

Every tool listed below is:

• Browser-based (no install required)
• Free with no signup (no trial, no subscription, no email gate)
• Runs offline after first load (audio samples cached in the browser)

I’m excluding apps that show ads in your face every 3 minutes, paid Patreon-gated tools, and “freemium” services that disable core features behind a paywall.

Categories

1. Online harmonium keyboards

The basic premise: a piano-style keyboard you can play with mouse, touch, QWERTY, or MIDI, that produces harmonium reed sounds.

• Play Harmonium Online (this site) — Real reed samples sourced from public-domain recordings, full MIDI support, sargam labels on the keys, multi-octave layout, configurable Sa.
• Several Hindustani Carnatic platforms also offer keyboards, typically with synthesised tones rather than samples — usable but less authentic.

If you primarily want a keyboard you can practise on, the sample-based options sound noticeably better than synthesised reeds.

2. Shruti boxes (drone)

A shruti box plays a sustained drone — usually Sa, sometimes Sa + Pa or Sa + Ma — that anchors your singing or instrumental practice.

• Our shruti box — All 12 keys, separate Sa/Pa/Ma toggles, real harmonium drone reed sample.
• Native phone apps (iShala, iTabla, etc.) are popular alternatives but require install.

For headphone practice, web-based shruti boxes are arguably better because they integrate with the same browser tab as your keyboard practice — no app-switching.

3. Tanpuras

Tanpuras are four-string drones with rhythmic plucking pattern, traditional for vocal accompaniment. Acoustically richer than shruti boxes — they produce overtones that fill the ear in a way drone reeds cannot.

• Our tanpura — 4-string drone with adjustable tempo, separately tunable strings, real tanpura sample.
• Several premium phone apps are the gold standard if you can pay; the free tier on those is usually time-limited.

For most home practice, a free web tanpura is indistinguishable from a paid app once you have the sample loaded.

4. Pitch detection (find your Sa)

Tools that listen to your voice via microphone and tell you which pitch you naturally sing.

• Find your Sa (this site) — YIN-algorithm pitch detection in the browser, no audio leaves your device.
• Standard chromatic tuner apps (Cleartune, Tunable) work for the same purpose but use Western note names rather than sargam.

The advantage of a Hindustani-specific tool: it shows you your Sa in the context of “your Sa is C4 (MIDI 60)” rather than just “you’re singing C4,” which is more useful when you’re choosing a key for practice.

5. Sargam ↔ Western converters

Tools that translate Hindustani sargam notation to Western letters and back, with key-aware conversion.

• Our converter — Live two-way conversion, configurable Sa, supports sharps, flats, octave markers, and bar lines.
• Some Carnatic-focused converters exist but mostly use Carnatic syllable conventions (sa ri ga ma instead of Hindustani sa re ga ma).

If you read piano sheet music and want to play from sargam (or vice versa), a converter saves enormous mental load.

6. Metronomes (taal-aware)

Metronomes that emphasise the structure of Hindustani rhythm cycles (sam, khali, etc.) rather than just clicking equal beats.

• Our metronome — Built-in Teental, Keherwa, Dadra, Rupak, Jhaptaal cycles with sam/khali emphasis.
• Tabla simulator apps (iTabla, etc.) are richer but typically paid.

For pure beat-keeping, a regular metronome works fine. For rhythm-cycle awareness, taal-aware tools are noticeably more helpful.

When you outgrow the free tier

The honest limit of free web tools: they don’t replace teachers. You can practise raga structures, drone, taal, and key-finding indefinitely on free tools, but learning expression — the difference between a competent rendition and a beautiful one — requires feedback from someone who has spent decades inside the tradition.

If you’ve been practising consistently for 6+ months and want to grow, look for:

• Online lessons with a teacher in India (typically $20–$50 USD per hour via Zoom, much cheaper than equivalent in-person teaching outside India)
• Workshops at Indian cultural centres in major cities
• Online courses from established institutions (Sangeet Research Academy, ITC, etc.)

The free tools are a foundation, not a destination. Used well, they get you to the point where a teacher can take you the rest of the way.

What to bookmark

If you’re starting today, the minimum useful set is:

1. A keyboard with Sa labels — for understanding the layout
2. A shruti box — for drone during all practice
3. A pitch detector — for finding your Sa once
4. A sargam converter — for reading any notation you encounter

Everything else (raga players, taal cycles, MIDI integration) becomes useful once those four basics are in your daily practice.