Spiritual Unity, recorded on July 10, 1964, is the album that made Albert Ayler and ESP-Disk famous. Ayler's sound was unprecedented, much rawer than any other jazz of the time. The 50th Anniversary Expanded Edition includes as a bonus the track ""Vibrations,"" which was briefly and accidentally substituted for ""Spirits"" on an early vinyl edition. It is the first time both ""Spirits"" and ""Vibrations"" have been on an edition of Spiritual Unity. All About Jazz says, ""If you haven't heard this record, you've missed out on one of the most profound artistic statements of the 20th century.