I'd describe them as obedientEvilDragon wrote:But there's nothing inherently "bad" in Zebra's oscillators.
They will do pretty much anything and do it well, but you have to tell them to do it, down to every last detail.The best way to approach Zebra is to have a bunch of template presets, for example, an "analog" one with pitch instabilities already programmed in, a "digital" one with several oscillators already selected and osc reset on and drift turned off, etc.
