Dallas foursome The Roomsounds have studied the classics — the Beatles, Stones and Tom Petty and the Heartbreakers are major influences, along with Big Star, the Black Crowes, Ryan Adams, Oasis and the Jayhawks.  But lead singer/guitarist Ryan Michael, guitarist/vocalist Sam Janik, bassist/vocalist Red Coker and drummer Dan Malone make their own sound, as evidenced by their new single, “Lay My Head Down,” a rocker with a bluesy southern tinge that’s almost a manifesto about the healing power of rock ‘n’ roll.