Hi all,
A while back I posted about tone suck in the FX loop. I stopped using the fx loop for my FX pedals in the loop for a bit then I tried again once the loop could be adjusted down to not overload my pedals.
But I have been finding the loop is very noisy - like a white noise hiss when turned on. You only notice it on decent headphones or if you turn the monitors up nice and loud.
Strangely the lower the FX loop output level the higher the white noise. Anyway I have been investigating further and think I may have found a bug.
So try this. Turn your kemper up nice and loud on your monitors. Then turn on the fx loop (post) in the x slot. Background hum seems to get quiter but can you hear a hisssssssss? Try touching your strings. That could release the hiss sound. It is almost like there is a noise gate effect on the loop.
So I looked at the mono loop parameters and started playing with them. Here is where it gets weird.
If I turn 'ducking from <0> to -0 the hiss vanishes completely and the 'noise gate' effect is gone. The 'tone suck' from the loop also appears drastically reduced. But my fx in the loop don't sound as they should.
Now I think there may be a bug with the ducking parameter because at <0> it shouldn't be doing anything to the sound should it?. What it appears to do is kill hum introduce hiss and also deaden the tone by introducing some sort of noise gate. But at one tiny notch back suddenly the blanket is lifted and things sound as they should. (with fx bypassed in the gate). Except if I turn my fx on I don't get the full fx level because the ducking parameter isn't neutral anymore.
Can anyone shed light on this? It is 100% reproducible every time for me.