Harmonica samples are derived from the FluidR3_GM SoundFont by Frank Wen
and contributors, distributed by the MIDI.js Soundfonts project.

Source: https://github.com/gleitz/midi-js-soundfonts
License: Creative Commons Attribution 3.0 Unported
https://creativecommons.org/licenses/by/3.0/

The original samples were trimmed and encoded as MP3 for a chromatic-harmonica
playback range. They are pitch-shifted, filtered, and combined with generated
breath processing by the Chromatic web application at runtime.

Neither Frank Wen, the FluidR3 contributors, nor the MIDI.js Soundfonts project
endorses Chromatic.