The metal band Coheed and Cambria is getting ready to release “Year of the Black Rainbow,” a prequel to the four conceptual albums that make up “The Armory Wars.”

The new album is set for release on April 13. The band is doing a series of pre-album release shows, including one at 7 p.m. Sunday at Port City Music Hall in Portland.

The 21-and-older show, with guest Earl Greyhound, is sold out.

For more information about the band and to stream audio, go to coheedandcambria.com. For more information on the concert, go to www.portcitymusichall.com.