This sfz's Sustain/Vibrato/Release folders contain samples by MTG. These sounds were extensively modified/looped by Jeff Glatt, who created this sfz version. You can find the original waveforms online at: https://www.freesound.org/people/MTG/packs/20216/

License details
---------------
Sampling+: http://creativecommons.org/licenses/sampling+/1.0/
Creative Commons 0: http://creativecommons.org/publicdomain/zero/1.0/
Attribution: http://creativecommons.org/licenses/by/3.0/
Attribution Noncommercial: http://creativecommons.org/licenses/by-nc/3.0

The remaining folders contain sounds by ldk1609. You can find the original waveforms online at:
http://www.freesound.org/people/ldk1609/packs/3560/

License details
---------------
Sampling+: http://creativecommons.org/licenses/sampling+/1.0/
Creative Commons 0: http://creativecommons.org/publicdomain/zero/1.0/
Attribution: http://creativecommons.org/licenses/by/3.0/
Attribution Noncommercial: http://creativecommons.org/licenses/by-nc/3.0/