There were already musicians in the house: his mother and grandmother at the keyboard, his father on trombone. David Rogers watched them and made a decision; he didn't want to imitate what they did. He wanted something entirely his own. What followed was decades of curiosity that moved outward through folk, jazz, classical, and the lute, and eventually backward, into the music of a Spain that no longer exists. Rogers performs at Wellfleet Preservation Hall on May 1st, tracing the Andalusian roots of flamenco and Spanish classical music through a program that begins centuries before the guitar was the guitar.