piyoDrums.bin is made up of extracted data from PiyoPiyo and thus a license cannot be stated for it.

PiyoPiyoJ itself:

	gabien-app-ppj - Editor/Player for 'PiyoPiyo' music files
	Written starting in 2015 by contributors (see CREDITS.txt)
	To the extent possible under law, the author(s) have dedicated all copyright and related and neighboring rights to this software to the public domain worldwide. This software is distributed without any warranty.
	You should have received a copy of the CC0 Public Domain Dedication along with this software. If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.

The engine:

	gabien-common - Cross-platform game and UI framework
	Written starting in 2016 by contributors (see CREDITS.txt)
	To the extent possible under law, the author(s) have dedicated all copyright and related and neighboring rights to this software to the public domain worldwide. This software is distributed without any warranty.
	You should have received a copy of the CC0 Public Domain Dedication along with this software. If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.

	(For reference, 'CREDITS.txt' just says "Just 20kdc for now... :(")

minimp3 and stb_vorbis (Reference track audio decoders) are both public domain.
They have been modified for use in the engine; the modified versions are included in the `gabien/gabien-common.tar` file of the source archive.

* minimp3 originally sourced from: https://github.com/lieff/minimp3/

	* No credits file was given, but the license is clear.

* stb_vorbis originally sourced from: https://github.com/nothings/stb/blob/1ee679ca2ef753a528db5ba6801e1067b40481b8/stb_vorbis.c

	Ogg Vorbis audio decoder - v1.22-G - public domain
	http://nothings.org/stb_vorbis/

	This version has been modified for the purposes of gabien-common {
		Things are different about the version here.
		In particular this version is intended for in-memory streamed decoding with seeking being an application concern.
		The original was retrieved from https://raw.githubusercontent.com/nothings/stb/1ee679ca2ef753a528db5ba6801e1067b40481b8/stb_vorbis.c !!!
	}

	Original version written by Sean Barrett in 2007.

	Originally sponsored by RAD Game Tools. Seeking implementation
	sponsored by Phillip Bennefall, Marc Andersen, Aaron Baker,
	Elias Software, Aras Pranckevicius, and Sean Barrett.

	Feature contributors:
	Dougall Johnson (sample-exact seeking)

	Bugfix/warning contributors:
	Terje Mathisen     Niklas Frykholm     Andy Hill
	Casey Muratori     John Bolton         Gargaj
	Laurent Gomila     Marc LeBlanc        Ronny Chevalier
	Bernhard Wodo      Evan Balster        github:alxprd
	Tom Beaumont       Ingo Leitgeb        Nicolas Guillemot
	Phillip Bennefall  Rohit               Thiago Goulart
	github:manxorist   Saga Musix          github:infatum
	Timur Gagiev       Maxwell Koo         Peter Waller
	github:audinowho   Dougall Johnson     David Reid
	github:Clownacy    Pedro J. Estebanez  Remi Verschelde
	AnthoFoxo          github:morlat       Gabriel Ravier

	gabien-common fork development:
	github:20kdc
