Online Sitar Tuner: The Complete Guide
Sitar tuning works differently from Western instruments. There's no single "correct" frequency for a string — instead, the performer chooses a comfortable Sa (tonic) to match their voice or ensemble, and every other string is tuned relative to that Sa. This tuner is built around that idea: set your Sa, then tune any string to any of the twelve swaras relative to it, all in your browser with no app or download.
How does an online sitar tuner work?
This tuner uses the Web Audio API built into modern browsers to capture a short sample of sound from your microphone, then runs it through an autocorrelation algorithm. Autocorrelation compares a sound wave against slightly delayed copies of itself to find the point where the pattern repeats — that repeat rate is the fundamental frequency of the note being played. That frequency is then measured as a number of semitones above or below your chosen Sa, and mapped to the nearest of the twelve swaras.
How to Tune a Sitar Online, Step by Step
- Choose your Sa. Use the − and + controls to set a comfortable tonic — many sitars are tuned with Sa somewhere around C or C#, but this varies by instrument size and player preference.
- Find a quiet space. A sitar's sympathetic strings (tarabs) can ring and resonate, so background noise and string resonance both make pitch detection harder.
- Tap "Start Tuner" and allow microphone access when your browser asks. This permission is required for any pitch-detection tuner to hear your strings.
- Pluck one string at a time and let it ring, damping the others with your palm if they resonate sympathetically.
- Watch the swara name, saptak (octave), and needle. The tuner shows which of the twelve swaras you're closest to and how many cents sharp or flat you are.
- Adjust the peg slowly until the reading shows "in tune" and the needle centers, then move to the next string.
Understanding Sa: The Movable Tonic
In Hindustani classical music, Sa is the tonic — the reference point every other note is measured against, similar in role to a Western "do" in solfège, but without a fixed frequency. A vocalist or instrumentalist chooses a Sa that suits their range, and an ensemble tunes together to whatever Sa the lead performer sets. That's why this tuner lets you set Sa yourself rather than assuming a fixed pitch: once it's set, every string you play is measured relative to that choice, exactly as it would be in performance.
The 12 Swaras
Hindustani classical music divides the octave into twelve semitone positions, the same underlying structure as a Western chromatic scale, but named and grouped differently:
| Swara | Full Name | Semitones from Sa | Western Equivalent |
|---|---|---|---|
| Sa | Shadja | 0 | Root |
| r | Komal Rishabh | 1 | Minor 2nd |
| R | Shuddha Rishabh | 2 | Major 2nd |
| g | Komal Gandhar | 3 | Minor 3rd |
| G | Shuddha Gandhar | 4 | Major 3rd |
| m | Shuddha Madhyam | 5 | Perfect 4th |
| M | Tivra Madhyam | 6 | Augmented 4th |
| P | Pancham | 7 | Perfect 5th |
| d | Komal Dhaivat | 8 | Minor 6th |
| D | Shuddha Dhaivat | 9 | Major 6th |
| n | Komal Nishad | 10 | Minor 7th |
| N | Shuddha Nishad | 11 | Major 7th |
Saptak: Mandra, Madhya, and Taar Octaves
Alongside the swara name, this tuner shows which saptak (octave register) a note falls in — Mandra (lower), Madhya (middle), or Taar (upper), relative to your chosen Sa. This distinction matters on sitar because the same swara name repeats in every octave, and knowing whether a string is meant to sound in the Mandra or Madhya saptak is essential to getting a raga's structure right, not just its individual pitches.
A Note on Equal Temperament and Shrutis
This tuner, like most digital tuners, maps pitch to the twelve equal-tempered semitone positions used across Western and modern Hindustani instrument tuning. Classical Hindustani theory also describes a finer 22-shruti system, with microtonal distinctions within and between some swaras depending on raga context. For everyday tuning of a sitar's main and drone strings, the twelve-swara equal-tempered approximation used here is the standard practical reference. If you want to explore or set finer microtonal shruti values directly, Tunerium's dedicated Shruti Generator and Tanpura Drone tools are built specifically for that.
Common Sitar Tuning Problems (and How to Fix Them)
The tuner won't detect any sound
This almost always comes down to one of three things: microphone permission was denied, the page isn't loaded over a secure (https) connection, or your input volume is too low. Check your browser's site settings to confirm microphone access is allowed, and make sure no other tab or app is already using the microphone.
Sympathetic strings are confusing the reading
A sitar's tarab (sympathetic) strings can resonate audibly when a main string is plucked, sometimes causing the tuner to briefly waver between two nearby readings. Lightly damping the tarabs with your palm while tuning the main and drone strings usually resolves this.
A string won't hold its tuning
New strings, and especially the fine steel and bronze strings typical of a sitar, stretch during their first period of use and will drift repeatedly until they settle — this is normal. Humidity and temperature changes also affect a sitar's tuning stability more than many Western instruments, due to the number of strings and the gourd resonator's sensitivity to environment.
Frequently Asked Questions
Is this online sitar tuner free to use?
Yes. This sitar tuner is completely free, runs in your browser, and does not require an account, download, or app install.
What is Sa in sitar tuning?
Sa is the tonic, or root note, of Hindustani classical music, equivalent to the keynote of a raga. Unlike Western instruments with fixed absolute pitches, Sa is not tied to one specific frequency — a performer chooses a comfortable Sa, often to match their voice or the pitch of their instrument, and every other swara is tuned relative to it.
What are the 12 swaras?
The 12 swaras are the semitone positions of Hindustani classical music relative to Sa: Sa, komal re, shuddha Re, komal ga, shuddha Ga, shuddha ma, tivra Ma, Pa, komal dha, shuddha Dha, komal ni, and shuddha Ni. They correspond to the same twelve equal-tempered positions as a Western chromatic scale, though Hindustani classical music also uses finer shruti divisions within them.
Why won't my sitar tuner detect sound?
Most commonly this happens because microphone permission was denied, the page is loaded over an insecure http connection instead of https, or background noise or sympathetic string resonance is making it hard for the pitch detector to lock onto a single string.
Can I use this tuner for tanpura or other drone instruments?
Yes, for setting individual strings relative to your chosen Sa. For a dedicated continuous drone reference, Tunerium's Tanpura Drone and Shruti Generator tools are purpose-built for that use case.
Pitch detection runs entirely on your device — audio from your microphone is never recorded, stored, or sent to a server.