THE British synth-pop singer-songwriter Imogen Heap is a devotee of found sounds. Her do-it-yourself music uses the noises of trains, thumping metal gates and cardboard carpet tubes as well as orchestral spirals of harps and trumpets. Though a pianist at heart, she embraces the blips of electronica and computer-programmed, multitracked vocals. Ms. Heap, who contributed silky, metallic vocals when she was part of the alt-pop duo Frou Frou, has done well with her second solo album, “Speak for Yourself” (Megaphonic/RCA Victor), which appeared last year. Songs from it continue to pop up on film and television soundtracks (most recently “The Last Kiss,” “The O.C.,” “The Chronicles of Narnia,” “CSI” and “Six Feet Under”). Ms. Heap, 29, is touring the United States through December. She recently spoke by telephone with Winter Miller about what she’s listening to now.