by monkel » 06-18-17 9:16 am
It may be legal, but sounds unlikely as the offering party would have to have permission by the artist / recording company / rights holder.
Also "legal" is a very vague term, as you may live in a totally different jurisdisction then the rights owner / download site operatorer etc.
If you found a way to make it usable for yourself in Synthesia, great, just don't redistribute further unless you want to be held responsible for your published work.