shredi knight
Power User
Last night I was trying to diagnose some zipper noise I was having with one of my 2 expression pedals (Boss FV-500H). With the patch I was using, expression pedal #1, which is directly plugged into my Ground Control Pro midi floor board's pedal jack, is attached to a Drive block and controls the amount of gain. Expression pedal #2 is directly plugged into the pedal jack on the back of the Axe-Fx and is attached to a Delay block and controls the level of the delay (no delay with the pedal all the way down/full delay with the pedal fully raised that is equal in volume to the dry signal ). Expression pedal #1 is the one that I was having the zipper noise issue with.
I wanted to see if the zipper noise was an issue with the pedal itself, or something else, so I switched how they were connected to test if the noise would still happen with the other pedal. I unplugged the TRS cable (the one connected to the Ground Control Pro) from expression pedal #1 and plugged it into expression pedal #2. After testing (I can't even remember now if there was still zipper noise), I reconnected the pedals how they were originally, and that's when my real problem started.
I started playing on the same patch and immediately noticed that the delay was very loud even though the pedal controlling it was all the way down (expression pedal #2, the one plugged into the Axe-Fx's pedal jack). I took a look at the Delay block's Modifier page and saw this on the display graph:
With the pedal all the way down, the black ball on the graph should be all the way in the bottom right corner. When I sweep the pedal through it's range, it goes from where you see it in the picture, to the top left corner, which is only about a third of the available range.
My first thought was something must be wrong with the pedal, but when I hooked up my other pedal (#1) to the Axe's pedal jack, it behaved the exactly the same way. I also tried using different cables, but it made no difference. When I tried plugging pedal #2 into my Ground Control Pro and not the Axe-Fx, it controlled the Delay normally, with full range. That can only mean the problem is with the Axe-Fx, it's the only constant.
After that I tried recalibrating the pedal several times (Axe's I/O menu, "Pedal" page), and even reinstalled the latest firmware, but nothing changed. The only thing I haven't tried that I can think of if a system reset, but I really don't want to have to re-setup everything again when I doubt that's going to solve the problem.
So that's where I'm at. I switched the way I had my pedals hooked up, switched them back, and for some reason that made my Axe-Fx stop working correctly with them. Anybody ever have anything like this happen to them or have any ideas what the problem is?
Thanks.
P.S. Sorry for the long ass description, I have a bad habit of over explaining things.
EDIT - Here's something I just noticed:
This is what the Modifier page looks like when my pedal is fully raised (I have the sweep reversed in case anyone is wondering). I have to move the pedal about halfway through its range before that black dot even starts to move now. Its like it's way up in that corner. That sort of explains why it doesn't reach the bottom corner when my pedal if pressed fully down.
I wanted to see if the zipper noise was an issue with the pedal itself, or something else, so I switched how they were connected to test if the noise would still happen with the other pedal. I unplugged the TRS cable (the one connected to the Ground Control Pro) from expression pedal #1 and plugged it into expression pedal #2. After testing (I can't even remember now if there was still zipper noise), I reconnected the pedals how they were originally, and that's when my real problem started.
I started playing on the same patch and immediately noticed that the delay was very loud even though the pedal controlling it was all the way down (expression pedal #2, the one plugged into the Axe-Fx's pedal jack). I took a look at the Delay block's Modifier page and saw this on the display graph:
With the pedal all the way down, the black ball on the graph should be all the way in the bottom right corner. When I sweep the pedal through it's range, it goes from where you see it in the picture, to the top left corner, which is only about a third of the available range.
My first thought was something must be wrong with the pedal, but when I hooked up my other pedal (#1) to the Axe's pedal jack, it behaved the exactly the same way. I also tried using different cables, but it made no difference. When I tried plugging pedal #2 into my Ground Control Pro and not the Axe-Fx, it controlled the Delay normally, with full range. That can only mean the problem is with the Axe-Fx, it's the only constant.
After that I tried recalibrating the pedal several times (Axe's I/O menu, "Pedal" page), and even reinstalled the latest firmware, but nothing changed. The only thing I haven't tried that I can think of if a system reset, but I really don't want to have to re-setup everything again when I doubt that's going to solve the problem.
So that's where I'm at. I switched the way I had my pedals hooked up, switched them back, and for some reason that made my Axe-Fx stop working correctly with them. Anybody ever have anything like this happen to them or have any ideas what the problem is?
Thanks.
P.S. Sorry for the long ass description, I have a bad habit of over explaining things.
EDIT - Here's something I just noticed:
This is what the Modifier page looks like when my pedal is fully raised (I have the sweep reversed in case anyone is wondering). I have to move the pedal about halfway through its range before that black dot even starts to move now. Its like it's way up in that corner. That sort of explains why it doesn't reach the bottom corner when my pedal if pressed fully down.
Last edited: