This is a demo of the very rare EKO ComputeRhythm drum machine.

via kovalmoog:

This is a pretty rare drum machine manufactured by EKO in 1972 in Recanati, Italy.

Model ComputeRhythm, maybe one of 15-20 ever made (curiously SN #0113).

This particular one is owned by a musician living in Madrid, Luis De La Cruz, and It was repaired and slightly modified by me on the past months (www.synthoma.net).

Before giving back to its owner I have the chance to made these demonstration videos to show its features and incredible programing methods.

Due to the price it was mainly used by famous electronic musicians like Jean-Michel Jarre and Manuel Göttsching (founder member of Ashra Tempel). J-M Jarre has used it extensively on his first albums: “Oxygene” and “Equinoxe”.

If you’ve used the EKO ComputeRhythm, leave a comment with your thoughts!

Here’s another demo, via kovalmoog:

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.

Resources:

• EKO Computerhythm at Jarrography
• EKO Computerhythm photos at Synthmaster