Thanks for the welcome :) Unfortunately, the @Toggle in the ini file only determines how the DOUT pins react upon incoming midi messages. My problem is, how do I get the same on the DIN-DOUT forwarding? All there is is an option to turn forwarding on/off, when on the DOUT pins simply follow the DIN pins. What I want it to do is a DIN pin toggling the corresponding DOUT pin, as in DIN low -> DOUT high, DIN high again -> DOUT stays high, next time DIN low -> DOUT low I reckon I'll have to change the DIN handler code for that. Unfortunately my programming skills are practically not present.