FRETWISE GUITAR SOUND CREDITS

Acoustic guitar: FluidR3 GM by Frank Wen and collaborators.
License: Creative Commons Attribution 3.0
https://creativecommons.org/licenses/by/3.0/

Clean electric guitar: Musyng Kite SoundFont.
License: Creative Commons Attribution Share-Alike 3.0
https://creativecommons.org/licenses/by-sa/3.0/

Both banks pre-rendered by Benjamin Gleitzman / midi-js-soundfonts.
Source: https://github.com/gleitz/midi-js-soundfonts
The MP3 note samples are unchanged; MIDI notes 24–100 are packaged as JSON.
The Musyng Kite sample collection is redistributed under CC BY-SA 3.0.
Fretwise adds equalization, compression, stereo placement, and room reverb during playback.