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
- Tap "Enable microphone" and allow access — or tap "Watch a demo" to see the mirror run on a simulated voice first.
- Start by holding your home note — the note the tune resolves to — for a couple of seconds. That anchors the mirror to your voice.
- 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.
- 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.
- Toggle the built-in drone for a soft reference at your tonic — the easiest way to stay in key while you sing.
- When two candidates are close, follow the hint: it names the one note that settles the tie.
- 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.