Music Analysis Tools

Key detector

Detect likely keys either from uploaded audio or from a manual set of notes so harmony work can start from the route that is easiest for you.

Tool

Run the tool

Add your inputs below and Ubetoo will return the result, output, or generated file in the result panel.

C E G A D F G A C

Optional audio file

Add one song

Drop one song here or browse for it, and the tool will use that file as the source for analysis or conversion.

No song selected yet Audio files

MP3 WAV FLAC M4A / AAC OGG / OPUS AIFF

Upload a track and the tool will estimate the most likely key family from the audio. Leave empty to work from notes manually.

Notes or chord tones

Enter note names separated by spaces or commas when working manually.

Prefer flat spellings

Useful for flat keys like Eb or Bb.

Reset

Result

C Major Pentatonic

The note set best fits C Major Pentatonic, with 5 compatible scale options shown below.

Input notes C, E, G, A

Best-fit key C Major Pentatonic

Compatible scales 5

Likely keys from the notes provided

C major pentatonic C, D, E, G, A

A minor pentatonic A, C, D, E, G

A blues A, C, D, D#, E, G

C major C, D, E, F, G, A, B

C mixolydian C, D, E, F, G, A, A#

How to use this tool well

Upload audio when you want a chroma-based key estimate and a ranked list of compatible key families.
Manual note entry is still the cleanest option when you already know the melody or chord tones.

Quick examples

Upload a song clip to get a likely key family
C E G A -> C major / A minor family

Related tools

Frequently asked questions

What is the key detector built for?

Detect likely keys either from uploaded audio or from a manual set of notes so harmony work can start from the route that is easiest for you.

Should I upload files or use manual entry in the key detector?

The key detector is designed around a direct form workflow, so the fastest path is to fill in the required inputs and run it.

Which inputs matter most on the key detector page?

On this page, the key inputs are notes or chord tones and prefer flat spellings. Enter note names separated by spaces or commas when working manually.

What file types or import layouts does the key detector accept?

Uploads: Upload a track and the tool will estimate the most likely key family from the audio. Leave empty to work from notes manually.

What will the key detector return after I run it?

The result panel leads with the main answer, then adds supporting metrics, notes, and downloadable output files when the workflow generates new media. It validates the inputs and builds a structured result in the page, which is helpful when the workflow needs richer formatting or multiple outputs.

How do I get the best result from the key detector?

Upload audio when you want a chroma-based key estimate and a ranked list of compatible key families. Manual note entry is still the cleanest option when you already know the melody or chord tones. Typical use cases include Upload a song clip to get a likely key family; C E G A -> C major / A minor family.