Made for music teachers
Lesson material, in minutes not evenings.
Record the piece, hand out a clean chart tomorrow.
Play or record the song, and Matra drafts the chart — chords, lead sheet, or sargam. You check the few things it flags with your ear (confidence marks show exactly where) — that pass is itself a teaching moment. Export a PDF for handouts anytime.
Free during early access · no card · private by default
How it works
Record or upload
Your own playing, a voice memo, a hum — up to six minutes. The exact Token price is shown on the file before anything is charged.
Matra writes the chart
Chords, key, meter and melody — drafted in about a minute, with confidence on every chord.
Fix, then keep it
Correct anything with a tap; the engine learns from it. Export PDF, MusicXML or MIDI — free, and free again next time.
What you get
One recording in — a whole chart out.
- Chord charts, lead sheets and sargam from any recording you make
- Check with your ear — confidence marks show the red-pen pass
- Transpose per student; capo hints for guitarists
- PDFs to print or share
- Private by default — your recordings stay yours
Questions, answered
Can I make materials for copyrighted songs?
You can chart anything you record or play yourself, privately, for your studio. Matra doesn't publish or host transcriptions of copyrighted songs — your charts stay yours.
How accurate is it?
Chords and key are our strongest outputs and carry per-chord confidence so you always know what to trust. Staff notation is early access — honest but imperfect today, and improving as the engine trains on more recordings.
What does it cost?
Right now — nothing. Matra is free during early access (fair use: about 20 recordings a day), and every file still shows its real Token price so there are no surprises later. The meter: about 1 Token per 15 seconds, a typical 3½-minute recording ≈ ◇14. When billing starts, early-access musicians keep ◇600 — plus half price for 3 months and 25% off the rest of their first year. Sargam and notation views cost nothing, ever.
Is my audio private?
Yes. Uploads are private by default, nothing you make is published anywhere, and we never train on your audio.
Built with the musicians who use it.
Matra is in early access. Fix a chord or a note the engine got wrong, and we gift you Tokens as thanks — your ear makes the engine better for everyone.
Free during early access · founders keep ◇600 when billing starts