HELLO EVERYONE. BACK IN 1984 MY GOOD FRIEND HAROLD AND I HOOKED UP OUR FIRST TEKTRONIX OSCILLOSCOPE TO SEE WHY THE CLOCK WAS DRIFTING ON OUR OLD SYNTH UNITS. WE FOUND THAT SWAPPING OUT THE AGING 6N138 OPTOCOUPLERS FOR FASTER MODERN PARTS LIKE THE 6N137 CLEARED UP THAT SLUGGISH RISE TIME INSTANTLY. THE SQUARE WAVE LOOKED SO CRISP AND BEAUTIFUL. LIFE IS FULL OF SMALL LATENCIES BUT WHEN WE WORK TOGETHER WE CAN SYNC OUR HEARTS AND OUR SYNTHS PERFECTLY. HAD GREAT RESULTS TESTING THIS ON OLD DIN HARDWARE. BLESSINGS TO ALL