| # Sources and credits |
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| The training audio was created by rendering scores with the instrument sources below and constructing mixtures from recorded notes. Source licenses apply to the corresponding material; this collection does not replace them with one blanket license. |
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| ## Synthetic instrument sources |
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| | Source | Sound identities | Terms recorded for the source | |
| | --- | ---: | --- | |
| | [Adventure Kid Waveforms](https://github.com/KristofferKarlAxelEkstrand/AKWF-FREE) | 2000 | CC0-1.0 | |
| | [Aquanode Soundscapes](https://github.com/aquanodemusic/aquanode-soundscapes) | 164 | CC0-1.0 | |
| | [Bengt Nilsson — Headroom Piano](https://github.com/sfzinstruments/BengtNilsson.HeadroomPiano) | 2 | CC-BY-4.0 | |
| | [Bobby Blues DX7 patches](https://github.com/fcaspe/dx7pytorch) | 1983 | Public-Domain-patches; GPL-3.0-Dexed-renderer | |
| | [D. Smolken Double Bass](https://github.com/sfzinstruments/dsmolken.double-bass) | 3 | CC0-1.0 | |
| | [Fluid R3 GM — Frank Wen and Toby Smithe](https://github.com/musescore/MuseScore/blob/v3.6.2/share/sound/FluidR3Mono_License.md) | 126 | MIT | |
| | [GeneralUser GS — S. Christian Collins](https://github.com/mrbumpy409/GeneralUser-GS) | 182 | GeneralUser-GS-custom | |
| | [Helm factory presets](https://github.com/mtytel/helm) | 163 | CC-BY-4.0 | |
| | [Ixox Flute](https://github.com/sfzinstruments/Ixox.Flute) | 1 | CC-BY-4.0 | |
| | [Steel Drum — Jeff Learman](https://github.com/sfzinstruments/jlearman.SteelDrum) | 2 | Unlicense | |
| | [LMMS authored presets](https://github.com/LMMS/lmms) | 447 | GPL-2.0 | |
| | [MTG Solo Sax](https://github.com/sfzinstruments/MTG.SoloSax) | 2 | CC-BY-4.0 | |
| | [Mxm40b Vital presets](https://github.com/Mxm40b/vital-presets) | 92 | Unlicense | |
| | [Nahush Vitalium presets](https://github.com/nahush2321/Vitalium-presets) | 162 | GPL-3.0 | |
| | [NSynth — Google Magenta](https://magenta.tensorflow.org/datasets/nsynth) | 839 | CC-BY-4.0 | |
| | [Odin2 factory presets — TheWaveWarden and contributors](https://github.com/TheWaveWarden/odin2) | 134 | GPL-3.0-or-later | |
| | [Osiris Piano](https://github.com/sfzinstruments/Osiris_Piano) | 2 | CC0-1.0 | |
| | [Surge XT factory/community presets](https://github.com/surge-synthesizer/surge) | 1969 | GPL-3.0 | |
| | [TinySOL](https://zenodo.org/records/3659365) | 13 | CC-BY-4.0 | |
| | [Vaporizer2 factory presets — VAST Dynamics and contributors](https://github.com/VASTDynamics/Vaporizer2) | 334 | GPL-3.0 | |
| | [OB-Xd authored banks — Zynthian contributors](https://github.com/zynthian/zynthian-data) | 1380 | GPL-3.0-data; GPL-2.0-renderer | |
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| License texts are in `licenses/`. Preset names and original sound identifiers are in `sources/instruments.jsonl`. Helm preset authors are Cris Owl Alvarez, Matt Tytel, Mikolis, Ones & Zeros, SF and Sf; individual credits are in `sources/helm-presets.json`. |
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| Odin2 source version `265e9e227581357efb87ed7217381f8a40c5e2bf` is included in `sources/Odin2-265e9e227581357efb87ed7217381f8a40c5e2bf.tar.gz`. Source versions for the other pinned preset collections are listed in `sources/versions.json`. |
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| ## Scores |
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| The score excerpts are drawn from the datasets below. Scores were cropped, transposed where applicable, and rendered with the instruments above; the resulting audio is newly rendered, rather than copied from these score datasets. Source identifiers and timings remain in the data indexes. |
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| | Dataset | Creators | Terms | |
| | --- | --- | --- | |
| | [CocoChorales](https://magenta.tensorflow.org/datasets/cocochorales) | Yusong Wu, Josh Gardner, Ethan Manilow, Ian Simon, Curtis Hawthorne and Jesse Engel | CC BY 4.0 | |
| | [Slakh2100](https://www.slakh.com/) | Ethan Manilow, Gordon Wichern, Prem Seetharaman and Jonathan Le Roux | CC BY 4.0 | |
| | [MAESTRO](https://magenta.tensorflow.org/datasets/maestro) | Curtis Hawthorne, Andriy Stasyuk, Adam Roberts, Ian Simon, Cheng-Zhi Anna Huang, Sander Dieleman, Erich Elsen, Jesse Engel and Douglas Eck | CC BY-NC-SA 4.0 | |
| | [GuitarSet](https://zenodo.org/records/3371780) | Qingyang Xi, Rachel M. Bittner, Johan Pauwels, Xuzhou Ye and Juan P. Bello | CC BY 4.0 | |
| | [MAPS](https://adasp.telecom-paris.fr/resources/2010-07-08-maps-database/) | Valentin Emiya and Bertrand David | CC BY-NC-SA 2.0 France | |
| | [URMP](https://labsites.rochester.edu/air/projects/URMP.html) | Bochen Li, Xinzhao Liu, Karthik Dinesh, Zhiyao Duan and Gaurav Sharma | Research score annotations; [YourMT3 distribution](https://zenodo.org/records/10009959), source terms retained | |
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| Noncommercial and share-alike terms continue to apply to material derived from the corresponding sources. The collection is not offered as unrestricted commercial-use audio. |
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| ## Recorded instrument sources |
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| Recorded notes were cropped, resampled, selected by pitch and duration, and mixed according to the score excerpts. Original source and note identifiers remain in the indexes. |
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| | Source | Credit | Terms | |
| | --- | --- | --- | |
| | [RWC Musical Instrument Sound Database, 2026 re-release](https://zenodo.org/records/17170844) | Masataka Goto, Stefan Balke, Meinard Mueller and original RWC contributors | CC BY-NC 4.0 | |
| | [GoodSounds](https://zenodo.org/records/4588740) | Music Technology Group, Universitat Pompeu Fabra, and GoodSounds performers | CC BY-NC 4.0 | |
| | [EGFxSet](https://zenodo.org/records/7044411) | Hegel Pedroza, Gerardo Meza and Iran R. Roman | CC BY 4.0 | |
| | [Bigcat Cello](https://github.com/sfzinstruments/karoryfer-bigcat.cello) | Kamila Borowiak and Karoryfer / D. Smolken | CC0 1.0 | |
| | [TinySOL](https://zenodo.org/records/3659365) | Carmine-Emanuele Cella, Daniele Ghisi, Vincent Lostanlen, Fabien Levy, Joshua Fineberg and Yan Maresz | CC BY 4.0 | |
| | [Spanish Classical Guitar](http://freepats.zenvoid.org/Guitar/acoustic-guitar.html) | FreePats contributors | CC0 1.0 | |
| | [Fashionbass, Growlybass and Sneakybass](https://www.karoryfer.com/karoryfer-samples) | Karoryfer / D. Smolken and library contributors | CC0 1.0 | |
| | [Ethan's Cello](https://ethanwiner.com/ewsf2.html) | Ethan Winer; SFZ conversion by Kinwie | Royalty-free use grant in `licenses/ethan-winer.txt` | |
| | [VCSL](https://github.com/sgossner/VCSL) | Versilian Studios / Sam Gossner and contributors | CC0 1.0 | |
| | [VSCO 2 Community Edition](https://github.com/sgossner/VSCO-2-CE) | Versilian Studios / Sam Gossner and contributors | CC0 1.0 | |
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| ## License links |
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| - [CC0 1.0](https://creativecommons.org/publicdomain/zero/1.0/) |
| - [CC BY 4.0](https://creativecommons.org/licenses/by/4.0/) |
| - [CC BY-NC 4.0](https://creativecommons.org/licenses/by-nc/4.0/) |
| - [CC BY-NC-SA 4.0](https://creativecommons.org/licenses/by-nc-sa/4.0/) |
| - [CC BY-NC-SA 2.0 France](https://creativecommons.org/licenses/by-nc-sa/2.0/fr/) |
| - [GNU GPL v2](https://www.gnu.org/licenses/old-licenses/gpl-2.0.html) |
| - [GNU GPL v3](https://www.gnu.org/licenses/gpl-3.0.html) |
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