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 )
More than one year passed… Oh well. Here is the online editor for the RC-5:
https://greggirardin.github.io/RC5_Edit.html
It’s description and other stuff - here:
There is also a file named rc5Copy.py, which is a python script that will copy audio files from the current directory to a mounted RC5 unit. See the file for description.