Regardless of the art field, medium, genre or practice,  all artists have bunch of material staying on the studio floor (sometimes literally) not making it into an official release. Very often the content is more then worthy but there are so many parameters cancelling or leading a work  to the moment it materialises itself into formally coming out. Still with the digital age on our side, it has become quite easy and with no compromise of quality to assemble a catalogue of such unreleased material which at best can offer a new perspective on official published works or on the other hand allow a discovery of  projects that never got big enough to travel or be distributed. Such assembly, you can find on my Soundcloud page dedicated solely to live and studio outtakes.