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Thomas Dolby may be best known for his 80s hit single, "She Blinded Me with Science" (complete with a iconic 80s video) but these days he's a tech geek of a different sort. Today, the producer, inventor and entrepreneur, talks about founding his own company that created the polyphonic ringtone software used in over 100 million cellular phones. Also: Josh Ritter's third album, "The Animal Years" is just out and it finds him expanding beyond the usual singer-songwriter mould into more adventurous territory. He joins us to share highlights. Finally, a look at "Sounds of Silence" a film premiering at the Tribeca Film Festival that profiles underground Iranian rockers and rappers struggling with censorship.