I'm looking to hook up an external pedal (Boss PS-6) that has a mono input and a stereo output. I know I would need a TRS Y-splitter from the PS-6 outputs to the PodGo FX return. What type of cable do I need to use from the Pod Go FX send to the mono input of the PS-6? Do I use a standard TS to TS or some type of converter for TRS to TS?