I am just starting my studio. I have the DSS and a Boss Dr-5. I have the MIDI OUT of the Dr going to the MIDI IN of the DSS, yet when I play the Dr-5, I will hear the sounds I have loaded on the DSS. I want the DSS to play the sounds loaded on the Dr-5. Any help with this will be appreciated.

You need the MIDI OUT of the DSS going to the MIDI IN of the Dr-5.