I know the answer will seem simple once I know what it is, but until then I am stumped. I am trying to tune/eq the various rooms in which we play with pink noise. I have a pink noise generator app plugged into the Stereo In of my CQ18T and send it to the mains. Room fills with pink.
I have a calibration/measurement mic plugged into channel 10. I can see the problem frequencies on the RTA for channel 10, but the RTA for the mains is obviously just the pink noise coming from the app, not what is happening in the room.
If I turn up the channel 10 fader, of course I get feedback. I suppose I can note the problem frequencies on channel 10, and then adjust for those frequencies on the eq for the mains. It seems like there should be a way to send the signal from the calibration mic to the mains RTA and adjust it directly. Any suggestions?
Not a solution to your problem, but just a piece of advice… You cannot “tune” a room using the technique you are using. This is because you only see the “what” with the limited data you are seeing from the RTA (limited to just frequency and magnitude). You cannot tell the “why” based on that data. Therefore it is quite common to try to “correct” things based on flawed assumptions because you can’t see the “why”. Long story short, using pink noise (or any audio) and a RTA is too limited to properly tune a room and often results in worse sounding audio that “looks good” on the RTA, but sounds worse in person.
If you really want to learn about the “why” in your rooms, you need to use software that has phase (ie time based) and coherence measurements in addition to the “frequency/magnitude” information. Something like SMAART and Open Sound Meter is what you are looking for.