Boss SY1 - use dual hold and expression together?

[Bassy]

Hi, can anyone help with this. The Boss SY1 has a trs jack in for an expression pedal or tap/hold. I am using dunlop dvp4 and a mosky dual tap. I have a split y trs cable - single trs to dual trs. If both the exp pedal and the dual hold are plugged in, the exp works but the dual hold has a lag and you have to hit it twice to work. The mosky hold switch works fine on its own. Any ideas why plugging the exp in would affect the tap/hold? 

Edited April 11, 2021 by Bassy

[Bassy]

I'll answer this 😊

You can use both an expression pedal and a tap tempo when you plug into an a/b selector with all trs jacks. Brightonion just made me one and it works perfectly!