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EKO ComputeRhythm drum-machine from 1972 (demo 2)

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Published on Aug 18, 2009

2nd part of demonstration.
Three jacks was applied on this drum machine, Trigger IN, Trigger Out and Start / Stop Out. On this demo, the Trigger IN feature is shown.
When a 1/4" jack is connected on the Trigger input, the sequence stops, and remain in "waiting" mode for an external trigger.
On this case the trigger is provided from a gate out of a Roland MPU-101 midi converter, then a midi software running on a PC (not shown) controls the tempo of the drum machine, beyond its own internal clock capabilities.
On high speeds the refresh of the webcam can't permit to see the MPU-101 gate LED flashing synchronized with the EKO sequence, but in very low tempo is easily noticeable.

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