Moog Music Forum

I'm trying to Trigger (not ADV/Clock) my DFAM with the Clock Out of Matriarch, but nothing happens. Same with the Clock Out of Grandmother. I checked the clock signal level with a scope, which gives about 5.0V from both outputs.
Controling the DFAM ADV/Clock with the same signal works without problems.
Also, triggering the DFAM with a clock from a Eurorack module, e.g. 960 Sequencer works, althoug the signal is even lower (3.8V) than from Matriarch. On the other hand, triggering any Eurorack module with Matriarch Clock Out works without problems.
I also tried attenuating the Trigger input signal which works for Eurorack outputs down to 2.5V but has now effect when I use the Matriarch Clock Out.
Moreover, triggering the DFAM with any of the Matriarch LFO outputs works.

I'm really confused which magic is going on here.

It seems that the DFAM trigger needs a really sharp pulse. I can get it to trigger from the VCOs when they are set to square wave, but not with the pitch, even when that's set to max. This even though the manual describes the trigger input as pulse or gate signal.

I just tried this with my Grandmother clock output into the DFAM trigger input and mine successfully triggers with no modification to the pulse. I measured the clock pulse on a scope and it's coming in at 4.7v, looking very square (no spike on leading edge like some). I then tried it with my Matriarch clock out with the same result, clock reading 4.8v on the scope, similar shape.

Thank you for checking. It seems to me as if my DFAM has a peculartity with the Trigger input.
I made further tests and amplified the Matriarch Clock Out. From about +6V of the pulse level the DFAM begins to trigger.
Also, the Matriarch ARP/SEQ Gate Out works.