One

One is a Christian progressive rock concept album by multi-instrumentalist Neal Morse and his fourth studio album. Released in 2004, this was released as both a single-CD album and a special edition double-CD with deleted tracks and cover songs.
The band is Neal, Mike Portnoy (ex-Dream Theater), and Randy George (Ajalon) with guest Phil Keaggy.

Lineup

Neal Morse (Spock's Beard, Morse/Portnoy/George, The Neal Morse Band) - Lead Vocals/Keyboards/Guitars

Guest Artists

Phil Keaggy (Glass Harp) - Guitar/Vocals
Chris Carmichael (Fifteen Strings) - Violin/Viola/Background Vocals
Gene Miller - Additional Vocals
Rick Altizer - Additional Vocals
Michael Thurman - French Horn
Rachel Rigdon - Violin
Hannah Vanderpool - Cello
Dave Jacques - String Bass
Jim Hoke (Little Dogs On The Prairie, Otto) - Saxophone
Neil Rosengarden - Trumpet
Bill Huber - Trombone
Glenn Caruba - Percussion
Aaron Marshall - Background Vocals
Missy Hale - Background Vocals