Trumpet audio samples FluidR3 GM by Frank Wen, rendered to MP3 by Gregory Leitz. Source: https://github.com/gleitz/midi-js-soundfonts/tree/gh-pages/FluidR3_GM Instrument: trumpet-mp3.js License as distributed by MIDI.js Soundfonts: Creative Commons Attribution 3.0 Unported. https://creativecommons.org/licenses/by/3.0/ This app embeds a subset of the MP3 samples and adjusts playback pitch and envelopes.