Are you thinking about the RC-505 by chance?
To the best of my knowledge, there are no audio effects on the RC-5, with the exception of a reverb that can only be applied to the built-in rhythm track.
Cheers!
Oh damn 
I thought that’s a disscuion about the rc 600… sorry
I’m sorry,
I thought it’s a discussion about the big looper ( rc600 )