Thanks!

This is actually a long topic because Muki contains a mixture of ripped vs sequenced tunes, etc. I've contacted some of the authors of sequenced tunes for permission, and also taken great care of crediting both the source where I got each one plus the company who holds the rights for the original tune. You can see this by clicking over a song's name when playing.

That said, I'm definitely not an expert on copyright so if there's something I'm missing please let me know! There's also more info about this if you click on the "about" link.