CA John's 2C amps now cause popping sounds when changing Scenes - bug?

Quad Cortex
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After just updating to the latest CorOS version 3.2.0, CA John’s 2C Ch2 and Ch3 amps now cause a noticeable popping/glitching sound when changing scenes. It seems to have something to do with the Gain Pull, Pres Pull and Shred settings, as the sound gets louder the more of these switches are in the On position.

These popping sounds occur on every scene change, even if literally no amp parameters change whatsoever. As long as the amp block is on, and I make a Scene change, a popping sound occurs. No instrument needs to be connected to QC.

This seems to be a new issue, as it certainly wasn’t present before updating. I made sure to test with the exact same preset as before, and also I made a brand new preset with nothing except CA John’s 2C Ch2 or Ch3 on it. Both now have the popping sound issue.

I also tried making scene changes while using other amp models, especially ones with similar On/Off parameter toggle switches, and they didn’t have any problems.

I contacted support. I truly hope that this issue can be solved soon, as this is my favorite amp. The feature seems to have broken in this update, unless I’m mistaken somehow. But it certainly was not present earlier in any of my patches.

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confirmed, same thing happening here- I’ll send in a report too

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Thanks for double-checking it!

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Same here. It began after I updated CorOS to version 3.2.0. Hopefully, the problem gets resolved soon.

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Thanks for confirming. Neural’s customer support responded that it appears to be related to a known problem in the current CorOS version, and that they’re actively investigating it.

Here’s to hoping it’ll be a quick fix!

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I don’t think they’re going to release a hotfix for this problem—it’ll probably be included in the next minor patch.
I tried several amps, but it’s hard to find a good replacement for CA John’s 2C Ch2/Ch3, since they don’t offer the Petrucci X or a Mesa Mark IIC amp yet.
I really love the drive sounds from the Mesa Mark series, but without those models, I’m not sure what to use.
Any suggestions?

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I’m starting to feel the same.

I have a gig on the 30th, so I gotta figure this out. I’ll start coming up with a tone tomorrow evening and share any ideas here ASAP.

btw, what about the “John’s” neural captures, could they work alright until this issue is fixed?

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Will try myself this evening, but maybe you already know:

Does this also happen when none of the amp switches is “scene automated" ( I mean the ABCD icon, don’t know the correct term)?

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Yes. All I needed to do to repro this issue is:

  1. Make a new empty preset.
  2. Add amp block: CA John’s 2C Ch2 or CA John’s 2C Ch3. No parameters are set to be “scene automated” (the ABCD thing). No other blocks are needed.
  3. Make sure you are in Scene Mode, then change from any scene to any other scene and the pops should happen.
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GOOD NEWS!

  • An issue where ‘CA John’s Amp’ devices produced pop noises when changing Scenes.
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@debugrammer Yes! I was just typing this to you at the same time! :smiley: This is great! I’m testing the new version right now.

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@Shredd Yeah, they did it! I just tested my five presets, including CA John’s Amp, and I think the problem is gone now. Nice!!

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Same here, no more popping noises! So glad this was fixed so quickly.

Thanks to everyone involved @Neuraldsp-DAO :heart:

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