Roland CR-78 - Sequencer Clock

Clock

Because the CR-78 has a sequencer, it has a Clock. The TEMPO knob controls the Sequencer Clock tempo.

However, you can also control the Sequencer tempo externally by sending 5V pulses to the EXT CLOCK input. With every pulse, the Sequencer advances one Step. No matter how much time there is between every GATE pulse. The CR-78 is very patient.
I used the GATE output of the AKAI MPC ONE to pulse the CR-78 Sequencer. Works beautifully. You only have to place a random note in the MPC MIDI timeline of the GATE Track to send the 5V Clock pulse on every note.

Connector

Wiring of the Stereo jack from the MPC ONE to the Mono Jack.
The MONO Jack goes into the EXT CLOCK as follows.

Standard wiring

Name	5V	FX	Audio	Colour

Tip	CV	Send	Left	White
Ring	GATE	Return	Right	Red
Sleeve	Ground		Ground

However, with the MPC ONE, you can decide for yourself whether the Tip or the Ring sends CV or GATE signals.
It's arbitrary.