Pitch Mirror

A free browser tool that names the key and scale you are singing — for singers, choirs, and anyone learning a song by ear. No sign-up, and everything runs on your device: nothing is recorded, stored, or uploaded. Sing or hum into your microphone and watch your melody draw itself as a live pitch trail while Pitch Mirror finds the note your voice keeps returning to and names the scale — major, minor, the modes, pentatonics. When two candidates are close, it tells you which single note settles it. A Song mode estimates the key of music playing nearby. Flip one switch and the same engine speaks Carnatic instead.

How to use Pitch Mirror

  1. Tap "Enable microphone" and allow access — or tap "Watch a demo" to see the mirror run on a simulated voice first.
  2. Start by holding your home note — the note the tune resolves to — for a couple of seconds. That anchors the mirror to your voice.
  3. Sing or hum slow phrases, holding notes at least half a second. Your melody draws itself as a glowing pitch trail, and the big readout names each note with its scale degree and a cents gauge.
  4. Keep singing — the mirror finds your tonic automatically and ranks the scales that match, sharpening as it hears more of you. Or pin the tonic with the Fixed toggle.
  5. Toggle the built-in drone for a soft reference at your tonic — the easiest way to stay in key while you sing.
  6. When two candidates are close, follow the hint: it names the one note that settles the tie.
  7. Switch to Song mode to estimate the key of music playing near the mic, or flip to Carnatic to hear the same singing named as ragas.

Frequently asked questions

Is my voice recorded or uploaded?
No. Audio is analysed in real time on your own device and immediately discarded. Nothing is recorded, stored, or sent to any server — close the tab and it is gone.
How does it find my key without being told?
It weighs every note you sing by how long you dwell on it, with extra weight for the notes you rest phrases on — singers naturally return to the tonic. Once one pitch clearly leads, that becomes your tonic, shown with its frequency in Hz.
Which scales does it know?
Major, natural and harmonic minor, Dorian, Mixolydian, and the major and minor pentatonics in Western mode. Flip to Carnatic and the same engine ranks ragas instead — the tool is one engine with two vocabularies.
Why is the detected key a different letter than the song’s original key?
Because the mirror names the scale in YOUR key. Nearly everyone transposes songs into their comfortable range — sing an E♭-major song from D and the scale family is identical, only the letter moves. Set the optional “Original key” in the panel and the mirror shows exactly how far you’ve transposed.
What if my singing isn’t pitch-perfect?
The mirror tunes itself to you, not the piano: it tracks your personal reference as it drifts and names notes relative to it, so consistently-flat or sharp singing still reads as the scale you meant. When one note runs persistently off, it tells you which one and by how much.
How is this different from Svara Mirror?
It is the same engine and the same page, opened in the Western vocabulary with copy written for singers who have never met a tanpura. Svara Mirror opens in Carnatic. Either can switch to the other with one toggle.
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