Complex sentence: In 1972, Eko released ComputeRhythm (1972), which was the first programmable drum machine as far as known; it had a 6 row push-button matrix that allowed the user to enter a pattern manually.
Split into simpler sentences: In 1972, Eko released ComputeRhythm (1972), which was the first programmable drum machine. It had a 6 row push-button matrix that allowed the user to enter a pattern manually.