20 years ago, with drum and bass and techno at its height in France, classically-trained cellist Vincent Segal and Cyril Atef, drummer and singer with a punk attitude, decided to make 100% improvised music, playing in bars "like a giant DJ". A mad idea, but it worked. They formed Bumcello: "I'm the bum, he's the cello", says Atef. The odd couple talk to RFI about their 8th album Monster Talk and how this improbable partnership has stood the test of time.