Chord finder · private beta
The chord finder that shows its confidence.
A Harmony result that shows where your ear is needed.
Declare Chord-based context and upload your playing. Matra shows only the musical views the engine produced for that recording. If a view is unavailable, the Studio explains why instead of inventing a result. Available chord events carry confidence; uncertain events remain reviewable.
How it works
- 01
Declare, then upload
Upload audio you have the right to process. Add musical context when you know it.
- 02
Open the declared result
Matra shows only the musical views the engine produced for that recording. If a view is unavailable, the Studio explains why instead of inventing a result.
- 03
Fix, then keep it
Editing always improves your chart. Your corrections (never your audio) also help improve Matra’s engines, separated from your account, unless you turn that off in Account › Privacy. Edit the current score, then export PDF, MusicXML or MIDI when that format is available for the result.
What you get
The result lists only the views and exports the engine produced.
- Harmony with per-chord confidence when the Harmony lens is available
- Declared key, tempo and meter when supported by the result
- Staff notation when the Staff lens is available
- Separate Hindustani and Carnatic Sargam lenses when produced
- Transpose the editable score when musical notes are available
- Capability-scoped PDF, MusicXML and MIDI export
Questions, answered.
How does the chord finder work?
Declare Chord-based context, upload audio, and review the Harmony lens if produced. Available chord events can be checked against the recording and corrected in Studio.
Can I get the chords of a famous song?
Matra accepts audio you have the right to process—your own playing, recordings or practice takes. It does not host a famous-song chart library, and the engine may abstain from unsupported or uncertain results.
Which instruments does it work with?
The import flow accepts several recording roles, but support is not universal. Dense mixes and unsupported material can reduce confidence or cause the engine to abstain.
What does it cost?
Invited members are not charged for analysis during the current private beta. Usage limits apply. Future credit, pack, subscription and discount policies have not been set.
Is my audio private?
Your recording stays private and can remain with your chart for playback or retry. Delete projects or your account yourself; see our Privacy Policy for retention and deletion. We never use your audio to train AI. Your corrections and your songs’ analysis (not audio) help improve Matra’s engines, separated from your account, unless you turn that off in Account › Privacy.
How accurate is it?
There is no single accuracy promise for every recording. Each available result carries its declared maturity and confidence, and you can inspect and correct the chart before using it.
Make music now. Pricing later.
Invited beta members are not charged for analysis. Current usage limits still apply.