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Inspector media/key-finder

Key & Camelot Finder

Overview

This finds the key of a track by folding its spectrum onto the twelve pitch classes and matching the result against the profiles music psychology derived from listener experiments. Before it does, it measures how the recording is actually tuned — a track cut thirty cents sharp, a band tuned to 442, or a tape transferred at the wrong speed will otherwise smear energy across neighbouring pitch classes and return a key a semitone out, confidently. The answer is shown on the Camelot wheel, where the three keys you can mix into are the three sectors physically touching yours, so the useful fact is visible rather than something you have to look up.

Harmonic mixingFind the key of every track in a crate and build a set that moves through neighbouring sectors.
Write a remix or a bootlegKnow the key before you pick a sample or a synth patch.
Check a library tagTags from a rip or a store are often missing or wrong. This reads the audio.

Set

Media 16

Neighbours

01 Audio Converter 02 BPM Detector 03 Video comprimeren 04 Audio uit video halen 05 Audio HLS Stream Generator 06 HLS Stream Generator

Specification

Command: media.key_finder
Set: Media
Input: MIXED
Output: —
Max. bestand: 1GB
Batch: single file

MPEG WAV FLAC MP4 OGG OPUS AAC WEBM

Runtime

Engine: ffmpeg-wasm 0.12
Threads: — workers
Isolated: —
WebGPU: —
Memory: —

Transport 0 B

The file is opened, worked on and written back inside this tab. No upload step exists in this tool — there is nowhere for the bytes to go.

Keys

Zoeken: ⌘K
Panels: ⌘1 · ⌘2
Full width: F
All keys: ⌘/

How it works

Drop a track

Decoded on your device. Nothing is uploaded.

Read the wheel

The detected key fills one sector; the three that mix with it are shaded.

Plan the mix

The same number in the other ring is the relative major or minor — the safest move on the wheel.

Frequently asked

What is the Camelot wheel?

A way of numbering the 24 keys so that everything which mixes sits next to everything else. Stepping one sector clockwise is a fifth up, the inner ring holds the minor keys and the outer the major, and each relative minor sits directly inside its relative major. In practice: from 8A you can move to 7A, 9A or 8B.

Why does it sometimes give the relative major instead of the minor?

A relative major and minor share all seven notes and differ only in emphasis, so they routinely finish within a few percent of each other. When that happens the confidence is low and the runner-up is worth reading — the tool shows both rather than presenting a coin-flip as a fact.

Does it handle tracks that are not tuned to A440?

Yes, and this matters more than people expect. The tuning offset is measured from the spectrum itself before the pitch classes are assigned, so a recording cut sharp or flat still lands on the right key. The measured offset is shown in cents.

Is my music uploaded?

No. Everything is decoded and analysed inside your browser.

Keys

Zoeken: ⌘K
Panels: ⌘1 · ⌘2
Full width: F
All keys: ⌘/

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