Yeah, to rephrase was Tas said, we were in the middle of working on our MPE implementation when we published this Zebralette 3 beta. But now that we have MPE in Diva, Hive, Repro etc. we can revisit Zebralette 3 and add MPE. This might happen some time after NAMM, which takes place at the end of this month.
In other words, we hope to be able to publish a new beta with many, many bugs and issues fixed, and hopefully with MPE support added. I just don't know if I make it before my vacation in February/March, or maybe towards Superbooth, which is set in May.
Zebralette 3 Bug Reports
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- u-he
- 30180 posts since 8 Aug, 2002 from Berlin
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xxchendricksxx xxchendricksxx https://www.kvraudio.com/forum/memberlist.php?mode=viewprofile&u=732344
- KVRer
- 1 posts since 13 Dec, 2024
Completely crashes Reaper when closing and reopening the ui. I can't use it at all. Running vst3i version on Windows 11 on an intel i5 1135G7.
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- KVRist
- 227 posts since 4 Jun, 2019
Same for me, but in my case there are random crashes when the GUI is open. I never have worked more than 10 minutes or so on a patch - it crashes way too often.xxchendricksxx wrote: Sat Mar 22, 2025 11:05 pm Completely crashes Reaper when closing and reopening the ui. I can't use it at all. Running vst3i version on Windows 11 on an intel i5 1135G7.
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- u-he
- 30180 posts since 8 Aug, 2002 from Berlin
A fix is pretty imminent... should have happened last week, but a guy called in sick when we were waiting for his final input.
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Funkybot's Evil Twin Funkybot's Evil Twin https://www.kvraudio.com/forum/memberlist.php?mode=viewprofile&u=116627
- KVRAF
- 12442 posts since 16 Aug, 2006
Send his innie to the break room and force him to read the Compuction Statement!
Severance? Anybody...?
Severance? Anybody...?
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- u-he
- 30180 posts since 8 Aug, 2002 from Berlin
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Funkybot's Evil Twin Funkybot's Evil Twin https://www.kvraudio.com/forum/memberlist.php?mode=viewprofile&u=116627
- KVRAF
- 12442 posts since 16 Aug, 2006
That was a season 1 reference, so all good! No spoilers.
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Andreya_Autumn Andreya_Autumn https://www.kvraudio.com/forum/memberlist.php?mode=viewprofile&u=553235
- KVRian
- 507 posts since 21 Feb, 2022
I think I've found a DSP bug, not sure if it has been reported before, it's not listed among the known issues as far as I can see. The attached patch shows it pretty well, with the filter or curve filter fx applied to a square or saw I'm hearing a constant high frequency crackling.
The screenshot shows it peaking around -110dB in Prism, while the fundamental hits -30dB. That's surprising since I'd usually expect stuff that quiet should be inaudible, but on headphones I can hear this very clearly.
The amount of crackling doesn't change with any setting I've found. Though the character changes with the resolution setting. It happens in both renderer modes. I also reinstalled beta 1 and the same thing happens there. Hope that's helpful!
The screenshot shows it peaking around -110dB in Prism, while the fundamental hits -30dB. That's surprising since I'd usually expect stuff that quiet should be inaudible, but on headphones I can hear this very clearly.
The amount of crackling doesn't change with any setting I've found. Though the character changes with the resolution setting. It happens in both renderer modes. I also reinstalled beta 1 and the same thing happens there. Hope that's helpful!
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- u-he
- 30180 posts since 8 Aug, 2002 from Berlin
For me it's 88 dB distance from fundamental to noise floor with your preset...
What OS and sample rate do you use?
What OS and sample rate do you use?
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- u-he
- 30180 posts since 8 Aug, 2002 from Berlin
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Andreya_Autumn Andreya_Autumn https://www.kvraudio.com/forum/memberlist.php?mode=viewprofile&u=553235
- KVRian
- 507 posts since 21 Feb, 2022
Interesting... But the crackles are audible to you also? Seems like something about the dynamics of that noise makes it feel louder than it is. If I generate a clean filtered square and add in noise to the same levels it's also audible but doesn't feel nearly as loud.
Anyway. 48k in reaper. MacOS 14.7.5.
And yeah, that's TDR Prism and with a +3dB/oct slope.
Anyway. 48k in reaper. MacOS 14.7.5.
And yeah, that's TDR Prism and with a +3dB/oct slope.
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Andreya_Autumn Andreya_Autumn https://www.kvraudio.com/forum/memberlist.php?mode=viewprofile&u=553235
- KVRian
- 507 posts since 21 Feb, 2022
Here it is again with a flat slope this time. As you can see, the noise gets quieter at high sample rates (see the "16x" at the top of the Zebralette3 window). In that oversampled case it's totally inaudible to me. It *is* still there though, but quiet enough that I need to high pass filter out the main sound to be able to turn it up enough to be audible without murdering my ears.
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- u-he
- 30180 posts since 8 Aug, 2002 from Berlin
I don't hear any crackles. But the filter is much more extreme than a normal lowpass filter. So it totally silences harmonics instead of just attenuating them by dozens of dBs. Dunno, maybe that's somewhat unnatural and has a psychoacoustic effect on perception of the noise floor.
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Andreya_Autumn Andreya_Autumn https://www.kvraudio.com/forum/memberlist.php?mode=viewprofile&u=553235
- KVRian
- 507 posts since 21 Feb, 2022
Huh ok, interesting. I really don't think that the total absence of those upper harmonics could possibly psychoacoustically create the experience of the crackly noise I'm hearing. And what I see on the analyzer does jumps up and down in level in a way that seems to corroborate the crackling actually being there.
Kinda surprised you're not hearing it. For me it is kinda quiet, but not crazy subtle. Let's say, quiet enough to be totally masked by saw patch playing chords, but loud enough to make the patch unsuitable as the bass in a more sparse mix. Just to be sure I compared to a similar sound in another synth to rule out my headphones being defective or something. Nothing there, definitely a Z3 problem.
I then tested it out a little more. If I start out with a sine wave and no oscillator FX, a similar noise is also present, but *way* quieter. If I filter out the actual sine and add like 40dB of boost, I can sorta begin to hear it. So not a problem in practice there. It seems like starting from a bright wave, then getting rid of the stuff above say 1k with oscillator FX exacerbates that noise. If I bring the filter all the way down, the noise gets quieter again. And if it's wide open the noise is masked by the upper partials. But in that midrange it gets kinda problematic.
Kinda surprised you're not hearing it. For me it is kinda quiet, but not crazy subtle. Let's say, quiet enough to be totally masked by saw patch playing chords, but loud enough to make the patch unsuitable as the bass in a more sparse mix. Just to be sure I compared to a similar sound in another synth to rule out my headphones being defective or something. Nothing there, definitely a Z3 problem.
I then tested it out a little more. If I start out with a sine wave and no oscillator FX, a similar noise is also present, but *way* quieter. If I filter out the actual sine and add like 40dB of boost, I can sorta begin to hear it. So not a problem in practice there. It seems like starting from a bright wave, then getting rid of the stuff above say 1k with oscillator FX exacerbates that noise. If I bring the filter all the way down, the noise gets quieter again. And if it's wide open the noise is masked by the upper partials. But in that midrange it gets kinda problematic.
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- u-he
- 30180 posts since 8 Aug, 2002 from Berlin
Oh sorry, I did not mean to insinuate anything, just merely rambling to myself there. So I'm unfortunately on a laptop here now, and before that I did listen to it on good headphones, but there wasn't anything I'd call crackles. But then, if it's a bug it may sound different on your machine than mine.
I can have another look - and a better listen - when I'm in the headquarters tomorrow. There is a possible bug in the bandpass filter, so I wouldn't rule out a bug in the lowpass either.
So my initial thought was, there could be noise from interpolation, and that's what I would think is what I'm seeing in the analyser. But if indeed oversampling makes it better, then interpolation should probably get worse.
So yeah, if oversampling improves the situation I would assume there's a good chance it's a bug indeed. Can't explain crackles, yet, but will go hunting them.
I can have another look - and a better listen - when I'm in the headquarters tomorrow. There is a possible bug in the bandpass filter, so I wouldn't rule out a bug in the lowpass either.
So my initial thought was, there could be noise from interpolation, and that's what I would think is what I'm seeing in the analyser. But if indeed oversampling makes it better, then interpolation should probably get worse.
So yeah, if oversampling improves the situation I would assume there's a good chance it's a bug indeed. Can't explain crackles, yet, but will go hunting them.