I need help trying to stop an annoying fuzz/static noise I get every 20-30 seconds when playing my amp via USB through my macbook.

My setup:

  • Macbook Pro
  • Fender Mustang LT25 Guitar Amp (plugged in via USB)
  • Epiphone Les Paul

Sound clip of the fuzz/static noise:



I'm trying to record my fender amp directly into garageband and it appears the best option is using the USB port. However, when I play through the macbook I hear a fuzz/static noise every 20-30 seconds. I've tried swapping usb cables, adjusting the USB gain on the amp, turning bluetooth off on the macbook, removing any devices nearby and I still hear this noise. The noise isn't exclusive to a particular software package. I've tried Garage Band (free), Amplitude 5 and Fender Tone. They all experience this sound every 20-30 seconds. And it's happens whether i'm playing or recording.

The only difference is if I play softer, or turn the usb gain down, the sound isn't as loud, but still there and still very noticeable. I'd say it's always about the same volume as my playing.

What else could be causing this annoying noise? How can I stop it from doing this?

Thanks for any advice and help!


It does sound like the signal's too hot somewhere.

Check you've got the latest firmware - How do I update the Firmware on the Mustang LT amplifier?
It seems they did add a peaking meter recently, according to that page.

  • Confirmed, latest firmware.
    – David
    Mar 12 at 12:56

I'm researching the same issue with a small Blackstar Core 10 amp. I get a static sound every 30 seconds (exactly) when running the amp into my laptop VIA USB. This happens at different buildings and with different laptops. It's bad enough to not use it for any digital recordings on the laptop. I'm going to try a line conditioner, but now I suspect its a problem with the amp.

  • Glad to hear it's not just me....and not just this model/brand. What laptops are you using?
    – David
    Mar 12 at 12:57

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