Open-source and third-party licences

Glitchord as a whole is proprietary software. The licences and dedications on this page apply only to the components they identify. No upstream project listed here authored, sponsors, partners with, or endorses Glitchord.

1. Chord Atlas ChordPro Standard Guitar Reference Subset

This component is a modified, normalised subset of ChordPro's Standard guitar configuration from release R6.101.0, pinned at commit 4b25408d830bd3f4c53fc6fb544b2babe4da09e1. It includes selected material from lib/ChordPro/res/config/guitar.json. The guitar-ly, guitar-br, and guitar-brm configurations and documented LilyPond-derived material are excluded.

The upstream and modified component is made available under the Artistic License 2.0. That licence applies to this component, not to unrelated Glitchord code, data, branding, or assets. Any purchase, subscription, or distribution charge for Glitchord is not a separate licensing fee for this component.

Modification and provenance statement

The upstream Standard guitar records were selected, converted into a normalised schema while retaining low-E-to-high-E source order, validated for harmonic and physical consistency, and merged as reference evidence with provenance retained. Alias identities and source locators are retained in the component's versioned Source form. The Source artifact is named Chord Atlas ChordPro Standard Guitar Reference Subset, version 1.0.0; it is not the complete proprietary Glitchord runtime corpus.

Source availability and rights

The versioned Source form is supplied under Artistic License 2.0. Recipients retain the rights that licence grants for this component, including permitted copying, modification, distribution, and redistribution. The source archive is the delivery mechanism for that Source form; it is not the legal permission for those acts.

Source archive: https://glitchord.app/open-source/chord-atlas-chordpro-standard-guitar-source.tar.gz

SHA-256 checksum: SHA256SUMS

ChordPro is identified only for factual attribution. ChordPro did not author, sponsor, partner with, or endorse Glitchord. Artistic License 2.0 grants no ChordPro trademark, service-mark, trade-name, or logo rights.

2. Standard guitar catalogue MIT sources

guitar-chords-db-json

The protected pre-V2 Chord Atlas product corpus retains its existing notice for guitar-chords-db-json by Zoltán Szabó (szaza), made available under the MIT License. Corpus V2 did not newly import this repository; the notice is retained for the protected earlier corpus.

chords-db

Validated reference evidence is used from chords-db, pinned at commit df06fa7b425cf5fd29485ff6591236b3557e3fac, under the MIT License.

guitarchords

Validated reference evidence is used from guitarchords, pinned at commit bdd5637a3086e723cf3e36e00ed1e08a6b7a09ae, under the MIT License.

MIT License text

MIT License Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the “Software”), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

3. Tabler Icons

Selected outline icons from Tabler Icons are used under the MIT License shown above.

4. FreePats Spanish classical guitar recordings

Progression Lab chord previews use selected recordings from the FreePats Spanish classical guitar sound bank, version 2019-06-18, created by roberto@zenvoid.org for the FreePats project. The recordings are made available under the Creative Commons CC0 1.0 Universal public-domain dedication.

5. Tuner confirmation sound

The tuner confirmation sound is universfield-new-notification-062-494544. Sound effect by Universfield from Pixabay, used under the terms applicable to that item.

6. Optional progression-analysis service

The separately deployed optional progression-analysis service uses music21 10.5.0 under the BSD 3-Clause License. The service is not bundled into the Android application. Its required licence notice accompanies each distribution of that service.

7. Questions

Questions about these notices or a source package can be sent to hello@glitchord.app.