Hi @Squelektron, I had a similar question earlier this summer and got my answers here - Clock sync to an effect pedal, courtesy of kind assistance from @Thibault_Squarp (thank you!)
I confirm that the solution works for me, I am able to sync the rate of tremolo to Pyramid’s tempo. I am using TRS cable for that purpose. The DIN SYNC value that works best for me is SYNC2.
For Strymon, please refer to Strymon DIG Delay Sync - Exploration #2 - YouTube (it’s DIG, but should work just the same for Deco).
I hope this helps.
Cheers, Piotr