Max Project T.Rex 1982: free drum plugin - Noizefield
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Paragon Project: Euclidean Drum Machine | PiCockpit | Monitor and Control your Raspberry Pi: free for up to 5 Pis!
Electronic Music Education and Preservation Project - EKO ComputeRhythm, programmable drum machine, prototype, 1971. Talk about rare, only 20 production units were made! A very exiting prototype example to say the least. #