Tangerine Dream the seven-time Grammy nominated European band is a singular phenomenon. As an instrumental band using just high-end modern technology simultaneously surrounded by a strong rock n roll identity they hardly fit into any given musical pigeonhole. Many have tried to copy what s became known as The Tangerine Dream Sound so far absolutely unsuccessfully. Originally released on CD in 2013 The Castle is based on a story by Franz Kafka and is the last of a series of albums with music based on the works of certain artists (after Edgar Allan Poe Gustav Meyrink and James Joyce).