Mos Scocious and special guests (here singer Emily Poole and keyboardist Ben Joseph) perform the tunes of "Beck's Song Reader" Thursday January 3, 2013 at the Tonic Room at 2447 N. Halsted in Chicago. | Tom Cruze~Sun-Times photo

Mos Scocious and special guests perform the tunes of"Beck Hansen's Song Reader" at the Tonic Room. | Tom Cruze~Sun-Times photo

Mos Scocious and special guests perform the tunes of"Beck Hansen's Song Reader" at the Tonic Room. | Tom Cruze~Sun-Times photo

Emily Poole and Ben Joseph of Mos Scocious perform "Beck Hansen's Song Reader" at the Tonic Room Thursday. Beck's latest project is a collection of published sheet music for musicians to play. | Tom Cruze~Sun-Times photo