willsquides Posted April 2 Share Posted April 2 There's quite a few factors at play here, so I'll do my best to communicate the problem succinctly. I'm having a bad noise issue when using the HX stomp with both: a) high gain dirt from other pedals in line before the stomp b) High gain modeled pedals/amps within the stomp In both scenarios, I'm getting a really bad squealing/whistling feedback sound at a constant level, regardless of how close I am to the amp/pedalboard. I first noticed this using the Stomp with my musicomlab loop switcher in 4CM into a Fryette PS2. As the switcher has an isolated input and output, I routed the send from the stomp through this into the front of the amp. The FX Loop send from the PS2 goes into the L return of the Stomp, and the L output goes into a Lex and UAFX Golden, finally into the return of the PS2 FX Loop. This routing helped with a much quieter squeal that I was getting initially. However, when pushing the gain to a certain level with a TS9 or other boosts, the louder squealing begins, even with the Stomp bypassed. When I remove the Stomp from the chain, the squeal is gone, regardless how far I boost. This also happens when I plug straight into the stomp, which I then connect to my computer with the USB output. If I push the modeled amp volume far enough, and use any modeled overdrive/distortion, I get the same squeal. This is just guitar into stomp into computer, no loop switcher or Fryette PS2. So I guess my question is; is is this typical behaviour for the Stomp? Initially I thought this would be some issue with ground loops and the PS2, but the fact that this can happen entirely within the stomp on its own it tripping me up. I've tried messing with input levels for everything but no luck so far. Does anyone have a similar experience/solution? Would be much appreciated if anyone can lend some insight Quote Link to comment Share on other sites More sharing options...
Schmalle Posted April 2 Share Posted April 2 Most certainly ground loop issues. When you connect only to USB how do you listen to the Stomp? Quote Link to comment Share on other sites More sharing options...
rd2rk Posted April 2 Share Posted April 2 If it goes away when you disconnect the USB, then it's a USB ground loop. A humbuster in the audio path (between the Stomp and the amp/speaker) will fix it. I use cheap PYLE PHE300 or PHE400 (has XLR) available on Amazon, but Behringer makes the same thing, probably in the same factory. Quote Link to comment Share on other sites More sharing options...
willsquides Posted April 2 Author Share Posted April 2 On 4/3/2025 at 2:22 AM, Schmalle said: Most certainly ground loop issues. When you connect only to USB how do you listen to the Stomp? I'm just plugging the stomp into my computer, then monitoring through Logic into my headphones from the computer's aux Quote Link to comment Share on other sites More sharing options...
willsquides Posted April 2 Author Share Posted April 2 On 4/3/2025 at 2:47 AM, rd2rk said: If it goes away when you disconnect the USB, then it's a USB ground loop. A humbuster in the audio path (between the Stomp and the amp/speaker) will fix it. I use cheap PYLE PHE300 or PHE400 (has XLR) available on Amazon, but Behringer makes the same thing, probably in the same factory. It happens both with the USB disconnected when playing with a real amplifier, and when using the stomp on its own connected straight into my computer Quote Link to comment Share on other sites More sharing options...
rd2rk Posted April 2 Share Posted April 2 On 4/2/2025 at 4:37 PM, willsquides said: It happens both with the USB disconnected when playing with a real amplifier, and when using the stomp on its own connected straight into my computer In that case it's most likely a Gain Staging issue. If you can record the sound when using an amp (recording thru a mic) and post it here with a copy of the preset being used (NOT a screenshot!) maybe someone can be of more help Quote Link to comment Share on other sites More sharing options...
datacommando Posted April 3 Share Posted April 3 On 4/2/2025 at 11:36 PM, willsquides said: I'm just plugging the stomp into my computer, then monitoring through Logic into my headphones from the computer's aux Hi, Just jumping in here, but why are you taking the monitor output signal from Logic and sending it to your Macs output? If you’re using the HX Stomp as your audio interface then you should assign it to handle all the audio in and out from Logic and connect your phones to the socket on the side of the Stomp. See page 61 of the HX Stomp 3.80 Owner’s Manual - USB Audio. https://line6.com/data/6/0a00051afdda673cccdb61c9c/application/pdf/HX Stomp 3.80 Owner's Manual - English .pdf In Logic go to Preferences > Audio and make sure that your HX Stomp is selected for both in and out. Hope this helps makes sense. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.