Connecting Steinberg MR816csx to an external effect unit Using S/PDIF IN/OUT jack

I figured it out! Finally. I leave it here just in case some other person might find it useful!

    1. I should have used MR editor and increase the level S/PDIF OUT.
  1. Set the MR’s clock to Internal. MPX automatically slaves to that.

However, I have still one issue! MPX has two input level meters. Only the left one goes up and the right one stays at minimum. Any one knows why?