MIDI Cntrl Sending Logic signals

[zynthetix]

I have had difficulty understanding this in the past, and it is creating a problem for me now. When I try to send logic pulses through the yellow send input of the MIDI cntrl send module, the signal does not come through to the yellow output of the corresponding MIDI cntrl recieve module. I have gotten around this in the past by sending the logic signal thru the blue input/output connections of the send/recieve modules, but that solution is not working for me now (I am outputting the Q-out signals of flip flops into the yellow input of the MIDI cntrl send module.)

Does the MIDI cntrl recieve module simply provide a short pulse when a logic high (no matter how long of a duration) goes into the yellow control send input of the corresponding MIDI cntrl send module?

[zynthetix]

I think I have answered my own question, but some confimation of my findings would be appreciated. To send a flip flop pulse through the MIDI cntrl send/receive modules, you actually need 2 flip flops. The flip flop which is generating the signal you want to send should have its Q output run to the yellow input of the MIDI cntrl send module and its Q-NOT output run to the blue control input of the MIDI cntrl send module, with the knob on the send module set to 0. On the MIDI cntrl recieve end, the second flip flop should have the yellow MIDI cntrl output tied to its Clock and Set inputs, and the blue MIDI cntrl output tied to its reset input. It seems like a waste to use twice the flip flops, but it is better than alternitavely using twice the MIDI cntrl send/recieve modules to accomadate one flip flop.

[blue hell]

For the CC sender :

The yelllow send input is not meant to be used to transfer logic pulses. It is a trigger input to make the module send out out the current value it has on it's blue input, even when that blue value did not change.

Normally the blue value is sent only when this value just changed.

For the CC receiver :

The yellow rcv output pulses whenever a new MIDI CC value was received by the module, regardless of whether that value was different from the previous value or not. It's just a brief impulse indication that something was received,.

So, when you do want to send pulses indeed you must use the blue input. And when you want to transfer the signal from a flip-flop's output that's just another pulse I'd say. When you want to transfer both the Q and the not Q output it would be cheaper to only send out the Q output and use an invertor on the receiving end to reconstruct the Not Q signal.

BTW, this info is from the help file, no secret knowledge here.

Jan.

[zynthetix]

ok, thanks for the feedback.