Play the drums on Linux with Hydrogen: 
Much of today’s music features the exacting work of a drum machine. The term might make you think of a drum set with mechanical levers and cranks armed with drumsticks, but all it actually refers to is a synthesizer programmed to play drum sounds. A good drum machine programmer (often also a drummer) can make a drum machine sound either hyper-robotic (if that’s the sound the producer’s going for) or almost human, with nuance and swing.
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