Never used personally your mixer or that converter but it looks like a solid solution. Some thoughts:
- the converter can likely preserve the correct ratio (5:4) of your picture; if that’s important to you, make sure the organizers set it up accordingly. Otherwise (for example if your visuals are fully abstract) you may choose to stretch your signal to 16:9 (assuming this would be the native ratio of the displays at the venue), as this would maximize the use of display or projection surface
- I’d suggest to use a BNC cable to connect the master output of your mixer to the DAC-70 SDI IN. BNC-RCA adapters aren’t always reliable (see here or here)
- if a display with composite video input is available, you could connect it to the LOOP THRU output on the DAC-70 to act as a monitor for you (this may be necessary or not, depending on your position during your VJ set. we once had to perform while facing a wall with our projections at our back and in such a case you want a monitor)