Matra’s engine is trained and evaluated only on datasets we are licensed to use, plus corrections our users choose to save. We keep a per-dataset audit trail. Attributions required by those licenses are listed here.
Training data
- GuitarSet — Q. Xi, R. Bittner, J. Pauwels, X. Ye and J. P. Bello, “GuitarSet: A Dataset for Guitar Transcription”, ISMIR 2018. Licensed CC BY 4.0.
- Additional training-safe datasets (MusicNet, public-domain notation collections, synthetic MIDI renders) are used under their respective open licenses, with attribution where required.
Benchmark-only data
Some datasets are used only to measure accuracy and are never trained on, in keeping with their non-commercial or research licenses. We do not redistribute any benchmark data.
Software
The open models behind the engine, and the people who made them, are credited on the Credits page.
- Verovio — music-notation engraving, used to render staff notation. Licensed LGPL.
- Type: Schibsted Grotesk, IBM Plex Mono, Manrope, Playfair Display and Spline Sans Mono, all under the SIL Open Font License.
- Music signs: the ♭ ♯ ° ø in a chord name, on screen and in a PDF, are eight glyphs of Bravura Text, copyright © Steinberg Media Technologies GmbH, under the SIL Open Font License 1.1. The subset is renamed Matra Chord Symbols, as the license asks of a modified version. Verovio draws the staff itself in the full Bravura font, under the same license.
Questions
For licensing questions or to report an attribution issue, email support@matra.studio.