Total posts : 45366
Yes, PhilB, and I’ve run into a rock wall trying to explain what you’ve said to a thick headed client when I provided pro audio service in the past. They thought I was creating fake work so I could charge more. But what you say is 100% true.
In my setup I have Winamp checked for mono so both the L and R outputs from the computer are each mono.
For the SStran transmitter I use the L line and one of those splitters you mentioned so I can feed both inputs for full level (since the transmitter has a built in L+R mixer);
For the transmitter with one input I use the R line from the computer straight in.
It’s yet another way of managing mono.