01011001 is the seventh studio album by Arjen Anthony Lucassen's long-running Ayreon project. "01011001" is the binary representation of the decimal number 89, and the hexadecimal number 59; it is the ASCII codepoint for the letter Y. 01011001's plot is tied to the "Planet Y" and "Forever of the Stars" storyline developed in the albums Into the Electric Castle, Universal Migrator and The Human Equation. 17 singers in total (including Arjen himself) contributed to the album. Of these, only Anneke van Giersbergen, Floor Jansen, and Arjen himself have sung on previous Ayreon albums: Anneke on Into the Electric Castle, Floor singing backing vocals on The Dream Sequencer, and Arjen on every Ayreon album, except Flight of the Migrator.

[Last contributor : Kojozone , Content under LGPL licence]