More about this:
The problem has become painfully obvious when working with a TR-808 or TR-606 for me.
Indeed the Pyramid is attempting to do both midi and din sync at the same time, and sadly this causes problems with some vintage gear. As has been very nicely noted above, we get a nice stutter of the first step in a sequence in certain modes of devices (Example: Manual Play of the TR-808) and the immediate thought is something like “What the hell? My 808 is broken!”
Not so (hopefully.) Again, as has already been noted in this thread, some of the midi data is hitting the reset because of the differences in midi sync vs din sync.
One solution is to prepare a cable or score yourself a cable that’s strictly din sync. This will prevent the midi clock information from messing with the din sync.
Another solution is easier: Turn off the midi output of output B on the Pyramid and just use it as a din sync output port.
These solutions both work, but the problem is that then you don’t get to use midi on port B at all.
Work arounds for this:
Get yourself a midi to din sync converter
This will filter the midi clock info and deliver din sync to what needs it, but it won’t dampen the other possible midi uses of port B. If you want to use this with a thru box to better connect more devices, then you can connect the converter box at any point down the line.
Check out the replacement output port
This has ended, but maybe there are others. I don’t know.
Vintage Roland Gear
Wherever possible, I would prefer to use din sync with the TR-808, 909, 303, 606 rather than using midi (where available) or even over converting midi to din sync.
In my opinion sync is just rock solid, and it doesn’t matter which version of the 909 firmware you have when using din sync.
So for me, using port B and breaking that clock out with my home made port expander is how I’m using it. So I switch off midi and just use port B as a din sync output clock.