Effects pedals going into input of OP-1

I guess the most simple config for using the OP-1 with an effects pedal would be going output -> pedal -> interface, but would it be possible to just connect the effects unit itself into the input of the OP-1 so you can apply the effect to a sample on its own etc.? How would this work?

Thanks

you need to either mute the input from going back to the output when recording

(i think u would just mute the return tape track)

or use a LR to L // R headphone splitter and panning tape tracks (see diagram)

or else u will get a feedback loop.