‘Shackle’ is a game for anyone who makes music including professionals and those who occasionally just like to play around with friends or on their own. The game is highly recommended for musicians who seek new territory. It can lead to a range of moments from brilliant inspiration to hilarious chaos. The music of Shackle is truely strong and varied. There are fast, raw passages and also very subdued parts where something new can be heard every time you listen. The power of the duo is that they evoke curiosity without becoming overly abstract.