Are we any closer to a system fix for the "zombie reverb burst"?

FractalAudio said:
I'll ask one more time:
1. Post the example presets.
2. Do NOT post a preset bundle.
3. Simplify the preset as much as possible. Remove any blocks that are not relevant. Disconnect any irrelevant modifiers.
4. Unlink all blocks from global blocks.
5. Use factory cabs if possible.
6. Include clear and concise instructions on how to recreate the bug.
7. Indicate the firmware version you are using.
Click to expand...
I was triggered by this thread, hopefully this helps.
Bug: is the "sonic boom" you'll here in the video when spillover is turned off.
1,2) see attached
3) reduced the given presets from @boyce89976
4) i'm on FM9
5) yes
6) turn spillover off, switch presets
7) FW 10.00 public beta 2

 

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That's not the original issue boyce89976 is talking about, but yes cutting off the tails mid ring out by switching channels or presets can cause a pop artifact that rings out in the new reverb. The longer and more dense the new reverb, the more stretched out and obvious the pop artifact becomes in the new tails.

The original zombie burst issue is a similar burst that can happen well after the tails have faded out. You can get a similar burst in the new reverb, but it can seemingly randomly occur out of nowhere without playing immediately before switching. I personally have not encountered the zombie burst in quite a while, but boyce89976 says he still gets it during gigs when changing presets, even with spillover turned off.
 
It is sound that is generated in/with the previous preset which should ideally get cut off when switching presets. That accounts for any sound originating from a previous preset. It might give something to work with...
 
md1234 said:
I was triggered by this thread, hopefully this helps.
Bug: is the "sonic boom" you'll here in the video when spillover is turned off.
1,2) see attached
3) reduced the given presets from @boyce89976
4) i'm on FM9
5) yes
6) turn spillover off, switch presets
7) FW 10.00 public beta 2

Click to expand...

I'm not sure that's the same thing.
 
mr_fender said:
That's not the original issue boyce89976 is talking about, but yes cutting off the tails mid ring out by switching channels or presets can cause a pop artifact that rings out in the new reverb. The longer and more dense the new reverb, the more stretched out and obvious the pop artifact becomes in the new tails.

The original zombie burst issue is a similar burst that can happen well after the tails have faded out. You can get a similar burst in the new reverb, but it can seemingly randomly occur out of nowhere without playing immediately before switching. I personally have not encountered the zombie burst in quite a while, but boyce89976 says he still gets it during gigs when changing presets, even with spillover turned off.
Click to expand...
I have experienced the same as @boyce89976 it can be well after a long time, and when switching in a quiet moment. It may happen when switching reverb channels in the middle of playing that it somehow gets stored up. The song ends; it’s quite; you switch to the other channel, and there it is. I think this is the issue, correct? If I’m wrong, I’ll delete my comment to avoid confusion, but it seems to be the same thing wether preset or scene change.
 
Digging further into it, I think it has got to do something with this... if you switch channels quick enough you can create a sample from the reverbsound. It is playing back the same thing basically everytime the channel is switched.
 

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@FractalAudio Also after switching presets with spillover off the sound plays back when selecting channel B at 0:21.
I think this is the "zombie reverb burst" we are looking for.
(There seem to be multiple reverb types 'under the hood' with their own buffer, that not all get cleared when switching presets?)
I attached both presets for completeness.
 

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Last edited:
Thenewexhibit said:
I have experienced the same as @boyce89976 it can be well after a long time, and when switching in a quiet moment. It may happen when switching reverb channels in the middle of playing that it somehow gets stored up. The song ends; it’s quite; you switch to the other channel, and there it is. I think this is the issue, correct? If I’m wrong, I’ll delete my comment to avoid confusion, but it seems to be the same thing wether preset or scene change.
Click to expand...
Yes that's the zombie burst. The two very well might be related, but the zombie one can come out of nowhere when things are quiet so its potentially much more noticeable. Again I haven't experienced it in a while but I also don't use a ton of heavy of reverb either.
 
md1234 said:
I was triggered by this thread, hopefully this helps.
Bug: is the "sonic boom" you'll here in the video when spillover is turned off.
1,2) see attached
3) reduced the given presets from @boyce89976
4) i'm on FM9
5) yes
6) turn spillover off, switch presets
7) FW 10.00 public beta 2

Click to expand...

Why are you still running the beta firmware?
 
ocaptainjr2 said:
Why are you still running the beta firmware?
Click to expand...
There is 1% chance this is firmware related and 99% chance my latest post 89 demonstrates/reproduces the issue this thread goes wild about.

It's not even my problem, just trying to be helpful to this thread.

And to answer your question, I'm in the middle of gigs and the beta is stable for me. I'll update next month.

Please return now to post 89 and lets find out if that clearly and consistenly reproduces the issue where this thread is all about, also on the FXIII.
 
@FractalAudio The cause seems to be using REVERB 2 (two) instead of 1!

-set Spillover Off

-create a new preset
-add IN -> REVERB2 -> OUT blocks
-reset REVERB2 channel A to Large Hall, set time to 10 sec, mix to 50%, balance to -50
-reset REVERB2 channel B to Golden Plate, set time to 10 sec, mix to 50%, balance to 50
-go back to channel A and save the preset to DEMO1

-create a new preset
-add IN -> REVERB2 -> OUT blocks
-reset REVERB2 channel C to Small Room, set time to 10 sec, mix to 50%
-save the preset (with channel C active) to DEMO2

-select preset DEMO1
-select REVERB2 channel B
-play a chord
-switch in 2 seconds to REVERB2 channel A
-select preset DEMO2
-wait 30 seconds
-select preset DEMO1
-select REVERB2 channel B, you'll hear the zombie reverb burst.

(Remind you i'm on FM9.)
 

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md1234 said:
There is 1% chance this is firmware related and 99% chance my latest post 89 demonstrates/reproduces the issue this thread goes wild about.

It's not even my problem, just trying to be helpful to this thread.

And to answer your question, I'm in the middle of gigs and the beta is stable for me. I'll update next month.

Please return now to post 89 and lets find out if that clearly and consistenly reproduces the issue where this thread is all about, also on the FXIII.
Click to expand...
Thank you for the unrelated context to a simple question. Please keep posting in bold and tagging Cliff in every post. That will surely go over well.
 
ocaptainjr2 said:
Thank you for the unrelated context to a simple question. Please keep posting in bold and tagging Cliff in every post. That will surely go over well.
Click to expand...
??? I'm simply trying to help and highlight important matters for the readers. Tagging Cliff is not something i normally do but he asked multiple times in this thread for precise information and i wanted his attention since i could reproduce the issue of this thread (i think, i hope).
 
this used to happen to me as well. there was no rhyme or reason, but when it happened it was pretty loud and definitely noticeable.

for whatever reason, it hasn't happened to me in a very long time.

I can verify that it is a phenomena, just can't tell you how to replicate it on a regular basis.
 
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