Sync OP-1 to Volca Bass with Retrokit 005

What am i missing? Can’t get the OP-1 and the Volca to properly sync. I connect the OP-1 via USB to the Retrokit and the Volca is connected to the Gate Tempo Sync on the Retrokit. As soon as i put the OP-1 in PO-Sync-mode the volca starts to play. Is there a way to start the volca only when i hit play on the OP-1?

I don’t use my 005 with a volca but I don’t think you need to be in sync mode, just use the settings for “ tip “ and “ ring” on the aux cable

Sorry but what do you mean by settings for tip and ring?