soundmodeler Posted August 18, 2020 Share Posted August 18, 2020 Hi, When I use the Helix’s cab sims through my PowerCab 112 Plus, I get a lot of low-end buzzing, especially when the volume or drive is raised. I've got the PC in FRFR mode and I’m connecting with a Line 6 cable. I’ve done some EQ tweaking, but the problem remains. Using IRs loaded in the Helix - checking to make sure Helix cabs are turned off - or the speaker selections in the PC itself doesn’t produce any buzzing at all. So I guess the PC speaker itself is okay. I ran the Helix through my combo amp, using just the power section, to see how the Helix amps/preamps interact with a different speaker. No buzz. So the buzzing only happens when I use the Helix cab sims through the PC, but I can’t think of what might be causing it and why shifting to the PC speakers or Helix IRs (I don't have any IRs loaded in the PC) eliminates the problem. Does anyone have a suggestion? Quote Link to comment Share on other sites More sharing options...
OmniFace Posted September 17, 2020 Share Posted September 17, 2020 Is it a physical buzzing, or a tone buzzing? One of my PC212+ will physically buzz if I run a bass guitar through it and turn it up a little. The other does not. Seems like a loose cable or something inside is rattling on the speaker or cabinet. Quote Link to comment Share on other sites More sharing options...
soundmodeler Posted September 22, 2020 Author Share Posted September 22, 2020 Thanks for replying. It's a tone buzzing. Quote Link to comment Share on other sites More sharing options...
OmniFace Posted September 24, 2020 Share Posted September 24, 2020 If it seems to be tone buzzing, my guess is that you're clipping digitally? It could be clipping internally on the Helix, or into the PowerCab, or even in the PowerCab itself. Put the "cursor" on the output block of the helix and view the new VU meters. See how loud it is and turn down the output as needed. Turn up the PowerCab to compensate if needed. Try a limiter or compressor before the output so you can reduce peaks while still getting more volume. View the ring on the PowerCab while playing. If it's clipping the input it will blink red each time. Again, turn down the Helix, and turn up the powercab to compensate if you havee headroom. If you are using any speaker sims or things in the PowerCab it could be clipping internally there instead. You can edit the settings to turn down the digital volume in the PowerCab until the buzzing goes away. Quote Link to comment Share on other sites More sharing options...
soundmodeler Posted September 25, 2020 Author Share Posted September 25, 2020 Thanks for the suggestions! I'll give them a shot and see what works. Quote Link to comment Share on other sites More sharing options...
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