Sound credits

Instrument samples

tonejs-instruments by Nicholai Brosowsky. Source: github.com/nbrosowsky/tonejs-instruments.

License: Creative Commons Attribution 3.0 Unported. creativecommons.org/licenses/by/3.0.

Acoustic guitar source: University of Iowa Electronic Music Studios. Piano source: VSO2, as credited by upstream sample-source-info.txt. Electric bass source: Karoryfer, as credited by upstream sample-source-info.txt.

The MP3 files on this site are unchanged copies. Playback may transpose nearby samples and apply gain and release envelopes. Used for chord playback on the chord finder.

Drop C open strings

Guitar Drop-C Tuning.ogg by Raoul NK. Source: File:Guitar Drop-C Tuning.ogg.

License: CC BY-SA 3.0. This recording is shared under the same license. creativecommons.org/licenses/by-sa/3.0.

The file on this site is an unchanged copy of the original. Used on Drop C tuning chords.

Drop D open strings

Guitar Drop-D Tuning.ogg by Raoul NK. Source: File:Guitar Drop-D Tuning.ogg.

License: CC BY-SA 3.0. This recording is shared under the same license. creativecommons.org/licenses/by-sa/3.0.

The file on this site is an unchanged copy of the original. Used on Drop D chords.

Recordings measured but not placed on the site

E major played on an acoustic guitar, by WBOSITG, 2008. Source: File:E-major.ogg. WBOSITG released this recording into the public domain. Commons marks it PD-self. The measurement on Open chords used this recording. It is not played on this site.

J. S. Bach's Prelude No. 1 in C major, BWV 846, played by Kimiko Ishizaka, 2015, from the Open Well-Tempered Clavier. Source: bach-well-tempered-clavier-book-1. The item's rights text is "Released under CC0 1.0 Universal". creativecommons.org/publicdomain/zero/1.0. This recording is not on the site. Dominant 7th chords used measure 3. Minor 7 chords used measure 2. Those pages do not play the recording.

J. S. Bach's Prelude No. 2 in C minor, BWV 847, from the same item and the same 2015 recording by Kimiko Ishizaka, also CC0 1.0. Minor chords used the 7.2-second point of the recording. That page does not play the recording.