Shruti

Live tuner

Sing or play a steady note. The needle shows cents from the nearest 12-TET semitone. Within ±5¢ is performance-ready; ±15¢ is workable; beyond that, work the tampura.

Pitch (server-detected via YIN)

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Cents from nearest semitone

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Mic stays on this device. Audio frames are sent to the server for pitch detection; nothing is stored.

How this works

Your microphone captures ~93 ms frames at 44.1 kHz. Each frame is posted to /api/pitch-detect, which runs YIN (difference function + CMNDF + parabolic interpolation) on the server and returns the fundamental in Hz plus the cents offset.

The pitch-detection algorithm itself lives behind the server boundary — only the result rides the network. The same approach gates the raga grammar and synthesis engines.