Applying effects to inlets?

hi, i recently got an octatrack. now i want to use it for mixing two other instruments.

i have plugged one stereo pair to a/b and one to c/d… when using the mixer it works.

now i’d like to use the effects on those inputs, too. how do i do this?

thanks for any help here.

cheers,
Ello

Use Thru machines instead of the mixer.