This sfz uses samples from Meatbass, a sample library by Drogomir Smolken and Ludwik Zamenhof. You can find the original samples online at:

http://www.karoryfer.com/karoryfer-samples/wydawnictwa/meatbass

License: creative commons 3.0 unported
Royalty-free for all commercial and non-commercial use.
Copyright 2015 Karoryfer Lecolds.