That sound like left over bug in the FMO rather, maybe a division by zero. Once that happens, a weird mathematical thing called "not a number", short "NaN" can happen, and once it enters a delay based effect, that effects keeps emitting NaNs, which goes silent.maschilli wrote: Wed Jan 21, 2026 8:09 pm Hello
I also want to report that something with the reverb FX is broken. I created a simple patch (1x OSC, 1x 18db linear LP filter and comp1 & Rev 1 on master fx and delay 1 on bus1) and everything was working until i added a new FMO where the synth didn't output any audio(or just really short snippet and then muted). deactivated and removed the FMO but still no sound. Deactivated rev 1 - sound was working again. Had to reload the plugin (reloading rev 1 didn't help) and now the patch with Rev 1 fx activated is working again.
Cheers Martin
Usually it is not the fault of the Reverb, Delay, Filter or Chorus whatsoever, but some other module beforehand emitting a single faulty sample.
The reason we quickly updated Zebra 3 today a second time was a NaN being emitted from the Modal Resonator in a specific patch.

