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1 TB free audio storage

Know the key and every chord before you play a note.

Upload a track and ask what key it is in and what chords it uses. Scarleta reads the harmony and hands you the key and the full chord progression, right in the chat.

Try it free
Building an app? Do this at scale with the API

How it works

No setup, no plugins. Just ask, and get the file back.

Step 1

Upload your song

Drop an audio file into the Scarleta chat: a full track, a loop, or a voice memo of you playing. No plugins to install and nothing to set up.

Step 2

Ask for the key and chords

Type it in plain language: "what key and chords is this?" The AI figures out which analysis to run, with no settings and no code.

Step 3

See the key, read the chords

Get the detected key and the chord progression laid out as a timeline you can actually read, right in the conversation.

Built-in storage

Every result is saved to your library, 1 TB free.

The files you bring and the key and chords results you get are kept in one place, so you can come back, compare earlier versions, share a link, or ask across everything you’ve stored, whenever you want.

1 TB free Share with a link Ask across your collection
Saved to your library1 TB free
Key and chords result
Ready to play, share, or reuse
Play Share Versions

Recipes

Make key and chords one step in a pipeline you run by name.

Chain it with other steps into a recipe you design once, then run on a single file in chat or on thousands at once.

Songwriter reference
Detect key and chordsExport chord dataTag and file
Cover song prep
Find the keySeparate stemsMatch loudness
Catalog analysis
Detect key and chordsBatch via APIExport as CSV

See it in action

Key and chords from any song, just ask

Simple, transparent pricing

Only pay for the audio you actually process.

$0.10/ minute

1 token = 1 second of audio, minimum 1 token per job.

Prepaid, no subscription 300 free tokens to start Top up from $10
See full pricing

More than one trick

Scarleta does a whole lot more.

The same account handles all of it. Here are a few very different things you can do with your audio.

Chat to do anything

Just ask. Vocals gone, key found, transcript ready.

Audio library

One home for every sound you own.

Remove vocals

Vocals gone in one message.

See everything Scarleta can do

For developers

Do this at scale with the API

Building it into an app or running a whole catalog? Send a batch of files to a key-and-chords recipe and let a webhook call you back when each analysis is ready.

curl -X POST https://api.scarleta.ai/v1/batch \
  -H "Authorization: Bearer $SCARLETA_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "recipe_id": "rec_0001_key_and_chords",
    "audio_urls": [
      "https://example.com/song.mp3"
    ]
  }'

# 202 + batch_id, status: "IN_QUEUE".
# Poll GET /v1/batch/:id/results, or register a webhook
# and we will call you the moment each analysis is done.
Read the API reference & Quickstart

Find the key and chords in minutes

Start on your free tokens: upload a song, ask for the key and chords, and read the progression right in the chat. Top up only when you need more.

Get started

Frequently asked questions

What do I get back?

The detected key and the chord progression. You can see the chords on a timeline right in the chat, and export the analysis as CSV or JSON to use in your own tools.

How much does it cost?

You pay per second of audio: $0.10 per minute, from prepaid tokens (1 token = 1 second). New accounts start with 300 free tokens, and top-ups begin at $10. No subscription.

Do I need to install anything?

No. Upload a track in the Scarleta chat and ask. It runs in the browser with nothing to download.

Can I run this on a lot of songs from my own app?

Yes. Developers can send many files at once through our API and get called back by webhook when every one is done. See the docs to get started.

Find the Key and Chords of Any Song — Scarleta | Scarleta