Tone Match Issue

Variable

Variable

Inspired
I realize there's probably an answer in all the tutorials out there, but following them I ran into this issue. Here is my signal path:

Code: 
Guitar -> Axe3 Input 1 -> Amp Block 1 -> TMA (set to Input 2) -> Cab Block -> Output 1
                       -> Output 3 -> Guitar Amp -> Fryete PS2 Load Box -> Input 2

What's happening is when I turn the amp off of standby, I get this high pitch oscillation. I know that the load box is working because I can run straight to the amp, load box, and to a Cab Block and it sounds great. Somewhere it seems like a signal is being duplicated, but I can't find where (and I'm not copying any outputs in the I/O settings). I know I'm missing something, but not really sure what.
 
Variable said:
I realize there's probably an answer in all the tutorials out there, but following them I ran into this issue. Here is my signal path:

Code: 
Guitar -> Axe3 Input 1 -> Amp Block 1 -> TMA (set to Input 2) -> Cab Block -> Output 1
                       -> Output 3 -> Guitar Amp -> Fryete PS2 Load Box -> Input 2

What's happening is when I turn the amp off of standby, I get this high pitch oscillation. I know that the load box is working because I can run straight to the amp, load box, and to a Cab Block and it sounds great. Somewhere it seems like a signal is being duplicated, but I can't find where (and I'm not copying any outputs in the I/O settings). I know I'm missing something, but not really sure what.
Click to expand...
can you post your preset?
 
I managed to figure it out. I was using the 1/4in line out on the PS2. I switched over to the XLR line out and into the Input 2 XLR and that did the trick. Seems like it was a line balancing issue somewhere in the chain.
 
if it’s any help, I had a similar issue with an amp going into the LB-2 Fractal load box that was ultimately fixed by engaging the ground lift switch on the back of unit. That way I could go back to using input-output 3 or 4 at unity gain
 
High frequency ground feedback loops are common with load boxes. That's why they usually have ground lift switches on them.
 
FractalAudio said:
High frequency ground feedback loops are common with load boxes. That's why they usually have ground lift switches on them.
Click to expand...

Makes sense. I did try the ground lift switch before moving over to the XLR out but it didn't make much difference. I guess that's why XLR was created :)
 
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