Zebralette 3 Bug Reports

[ChanceB]

I’m on a m1 MacBook Air using FL Studio and the Au plugin. Some of the presets use a crazy amount of processing power. It seems the spectral effects,especially spectral decay are very resource intensive,which is to be expected but they are almost unusable currently

[MachinaeWolf]

Randomly when loading zebralette 3 it crashes or sometimes when I close the vst window and come back to it, it will randomly crash. Well it says it crashes, it will still let me make sound but some things don't work like editing points for the oscillator or mseg.

*operating system: windows 10 64bit
*host application: Renoise 3.4.3
*plugin format and revision: VST3 15573
*sample rate and audio buffer size: 44100 and 35ms latency

[Ronny Pries]

Some graphic issues in the matrix on the right side.
Cubase Pro 12.0.70 / WIN11 Pro 22H2 / i9-12900KF / 64 GB /

Can confirm static UI glitches in both matrix and keyboard:




Furthermore:

- CLAP crashed once upon loading in Bitwig
- Hosting mode: grouped by plugin
- W/o any other prior instances
- Reproduction failed so far (gave up after 10 attempts)
- Otherwise stable

CLAP @ Bitwig 4.4.10
RME UFX III @ 48000/256
Win10 Pro 22H2 64bit v19045
i9-9900k, 32gb RAM
NVidia 4080, driver 551.31

[schraube]

I tried the preset "Minty Breath" and I get a DC detected stop on my RME interface when I play a three note chord. When producing sound, very low frequencies are produced that are not audible, but you can clearly see them on an equalizer. With a lowcut filter behind, there are no problems.

Mac mini M1 (8 GB)
Live 11 Suite (11.3.21)
RME-2 DAC FS
44100 / 256

[GruvSyco]

I tried the preset "Minty Breath" and I get a DC detected stop on my RME interface when I play a three note chord. When producing sound, very low frequencies are produced that are not audible, but you can clearly see them on an equalizer. With a lowcut filter behind, there are no problems.

Mac mini M1 (8 GB)
Live 11 Suite (11.3.21)
RME-2 DAC FS
44100 / 256

I'm curious where you see the DC detected stop. I tried it out and saw nothing suspicious. Not exactly the same setup but close enough I thought I'd try.

Macbook Pro M1 (8GB)
Live 11 Suite (11.3.21)
RME Fireface UCX (Firmware v49 Driver 4.09)
44100 / 256

[viraven8]

Am I doing something wrong? This can't be right.

Opened up Zebra3, set the init Saw with Phase reset + Additive engine.

Opening any wave viewer (I use FL's wavecandy), you can see that there is moving inharmonic phase rotation. In otherwords, the phase of the sines are moving slightly out of tune. This doesn't impact the timbre, but it impacts the polarity of the wave can thus can cause problems with mixing.

Attachments shown have the same timbre but the waveforms are changing over time.

No other additive synth does this

[muki]

immediate crash when...:

open logic
insert zebralette3
open window
ctrl-click (trackpad 2finger-click) into the OSC wave window
select "copy" or "copySVG" from the pulldownmenu
bang - imediate complete crash

that's a mac mini 2012, mojave, 16GB ram
logic 10.5.1
and the same with hostingAU

and the same happens in the big OSC editor window

and the same for the MSEG editor (and big editor window)

system crashreports and u-he-log are saved in case of interest

[tumface]

I'm not sure exactly what I did, but it has greatly angered Descartes.

Screen Shot 2024-02-17 at 22.29.45.png

[muki]

nvm

[pdxindy]

I'm not sure exactly what I did, but it has greatly angered Descartes.

Did you use the beautify command? That has happened to me when using it.

[tumface]

I'm not sure exactly what I did, but it has greatly angered Descartes.

Did you use the beautify command? That has happened to me when using it.

Yep, that seems to be it.

[schraube]

I tried the preset "Minty Breath" and I get a DC detected stop on my RME interface when I play a three note chord. When producing sound, very low frequencies are produced that are not audible, but you can clearly see them on an equalizer. With a lowcut filter behind, there are no problems.

Mac mini M1 (8 GB)
Live 11 Suite (11.3.21)
RME-2 DAC FS
44100 / 256

I'm curious where you see the DC detected stop. I tried it out and saw nothing suspicious. Not exactly the same setup but close enough I thought I'd try.

Macbook Pro M1 (8GB)
Live 11 Suite (11.3.21)
RME Fireface UCX (Firmware v49 Driver 4.09)
44100 / 256

Tried again this morning and couldn't reproduce the DC Detected error again. I forgot to mention that it wasn't the standard preset that caused problems, but rather when I changed the envelope on the OSC. However, very low frequencies that caused the crashes yesterday are still being caused.

[tasmaniandevil]

Can confirm static UI glitches in both matrix and keyboard:

Yep, GUI glitches on Windows are currently expected, mentioned in the known issues and the first post. We already tried to fix those, but it wasn't as easy as we hoped to get rid of them.

[Ronny Pries]

Unpredictable wt engine CPU consumption

I wasn't yet able to reliably reproduce how I arrived at this patch.

It seems that single cycle waveforms of different lenghts have different impacts on CPU use. Contrarily to my expectation, the shorter the cycles, the more irratic the CPU becomes. At some point, even at a resolution of 200hz.

On my machine, playing above patch with a 5 voice chord, exceeds my CPU. Iirc, it's using two cycles of 128 samples:


Replacing the cycles with longer one's (eg 2048 samples), the CPU slightly drops:


Outside the patch's context, the CPU use also varies with cycle length. I already froze the plugin using init patch whilst playing a 5 voice chord sequence. And consecutively importing two cycles of different lengths. I'll report back if I discover a reliable reproduction pattern. (Memory leak?)

Here's a zip with the patch and a few cycles for testing.

[hakey]

z3.png

Using the HandleRotate tool pushed the line outside of the grid. Not sure if it's a bug?

Edit - it's a known issue