e.g. I play an A, the PF plays the A followed 1/2 a second later by a C with no other delays or repeats.

Any ideas how to set this up again?

Do you want a diatonic or chromatic pitch shifter?

If you want a chromatic one, go with the H910/H949 algorithm. Like what Nick said, set Mix to 50, Pitch A to +3m (1.189), Delay A to 500 ms, Feedback A to 0, and turn off Pitch B since you just want one pitch.