The DrumSynth project is released as both MIT and GPL2+, quoting:
DrumSynth is released under the MIT license or under the GPL
"either version 2 of the License, or (at your option) any later version".
The library that we bundle seems to be direct copy of the library folder from the DrumSynth project.
https://sourceforge.net/projects/drumsynth/
The DrumSynth project is released as both MIT and GPL2+, quoting:
The library that we bundle seems to be direct copy of the
libraryfolder from the DrumSynth project.https://sourceforge.net/projects/drumsynth/