The Conservatory — third-party engines and their licenses

Demucs (Meta AI Research) — MIT. Source separation model htdemucs. https://github.com/facebookresearch/demucs
basic-pitch (Spotify) — Apache License 2.0. Audio-to-MIDI. https://github.com/spotify/basic-pitch
librosa — ISC. Audio analysis. https://librosa.org
music21 (MIT / cuthbertLab) — BSD-3-Clause. Symbolic music toolkit. https://github.com/cuthbertLab/music21
FluidR3 GM SoundFont (Frank Wen) — MIT. General MIDI sample bank used to render pitched parts.
fluidsynth — LGPL-2.1 (used as an external program). https://www.fluidsynth.org
Salamander Grand Piano (Alexander Holm) — CC-BY 3.0. The sampled grand piano heard on the
Glass Studio track. https://freepats.zenvoid.org/Piano/acoustic-grand-piano.html
DRSKit (Lars Muldjord, Bent Bisballe Nyeng — DrumGizmo project) — CC-BY 4.0. The multi-microphone
drum kit recording heard on the Glass Studio track. https://drumgizmo.org
OpenAIR impulse responses (Audiolab, University of York — www.openairlib.net) — CC-BY 4.0. The
recorded rooms (a typing room, a small hall, a church) heard as the reverbs on the Glass Studio track.
Karoryfer Samples · Growly Bass (Squier Jazz Bass), Emily (Epiphone electric guitar), Shinyguitar
(archtop guitar) — CC0 1.0 (each archive carries the CC0 legal code; the readmes add "royalty-free
for all commercial and non-commercial use"), © Karoryfer Lecolds. The
bass and guitars heard on the Glass Studio track. https://www.karoryfer.com/karoryfer-samples
Surge XT (Surge Synth Team) — GPL-3.0 synthesizer; its rendered audio output is not covered
by the GPL and is first-party. https://surge-synthesizer.github.io
VCSL — Versilian Community Sample Library — CC0. Sampled percussion. https://vis.versilstudios.com/vcsl.html
onnxruntime — MIT. torch / torchaudio — BSD-3-Clause. FastAPI / uvicorn — MIT.
Groove MIDI Dataset (Google Magenta) — CC BY 4.0. A drum-groove GRAMMAR (hit probabilities per
16th position) was learned from it; no MIDI from the dataset is redistributed. Attribution:
Gillick, Roberts, Engel, Eck, Bamman. "Learning to Groove with Inverse Sequence Transformations." ICML 2019.

First-party (Bonis Systems): the theory verifier, composer, groove/rhythm, arrangement, mixdown and
ITU-R BS.1770 mastering code, and this service.