About Sruti

What it is

Sruti is a Carnatic music analyzer. Upload a recording and it listens for the pitches you sang or played, works out which swaras those are relative to your Sa, and ranks the raagas whose scale best fits what it heard. It then generates a short educational write-up of the top candidate.

How it works

The audio is decoded and pitch-tracked with librosa. Detected pitches are folded against your tonic (Sa) — either the value you set in Hz, or one detected automatically from the recording — and grouped into the twelve semitone swara positions used in Carnatic notation.

Those swaras are matched against a database of common raagas. A raaga is ranked by how well its arohana and avarohana cover the swaras heard, penalising both scale swaras you did not sing and detected swaras the raaga cannot explain. The top match is sent to the Anthropic Claude API to generate a short, plain-English description.

Getting good results

Cleaner input helps. A solo voice or single instrument in a quiet room, holding each swara long enough to be tracked, works best. Backing tanpura is fine.

If the detected raaga looks off, the tonic is usually the cause. Set your Sa explicitly in the tonic field — the note picker converts a note name to Hz — and re-analyze.

What it is not

Sruti is a teaching aid, not a musicologist. It ranks candidates from a fixed database of scales, so a rare or regional raaga may not appear, and short or ornament-heavy passages can favour a parent scale over its derivative. The generated analysis is AI-written and can be wrong. It is not medical or therapeutic advice.

Privacy

Uploaded audio is deleted immediately after analysis, whether it succeeds or fails. No recordings are stored, and no account is required. See the Privacy & Data page for the full details.