Вот тут Matt Tytel объясняет про фильтры, почему они такие, какие есть
"I feel like I should address the filters since it seems to be a point of debate.
There is one main criticism that I feel is valid and should comment on.
Resonance/Self-oscillation:
This is probably the biggest difference between Vital and some analog (and analog-modelled) filters. Many have noted that Vital's self-oscillation is pretty quiet compared to other synths. This is true and it's by design. If you don't like this, you can lower the level of the oscillator going into the filter and turn up the master volume to make it have louder resonance.
Why would I do this by design? This requires a little background in how filters work.
The cutoff in many analog filters is interestingly slightly modulated by the input level. This is most obvious with a ladder filter, try sending a really low freq sine wave (something like 2hz) into a self resonating ladder filter and you'll hear some vibrato in that resonance. Effectively the input level does cutoff FM, and the louder the signal the stronger the FM is. I think this really adds a lot to the character of ladder filters and other models. I really enjoy this self-oscillating driven sound and wanted more of it so I designed the filters in Vital to be more driven by default. A side effect of that design is that it lowered the resonance/signal ratio and I actually prefer that. If you don't, as I said above lower the osc input and raise the overall volume
I'm assuming that a lot of the complaints are because Vital's filters don't behave like some other synth and not that there aren't interesting sounds you can make with Vital's filters.
There are a lot of unique blending options (Ladder: Notch Spread is my favorite) and tools (like audio-rate key-tracked lfos) that I feel I've opened some new synthesis options just with the filters. I made a short video a while ago doing some Fitler FM with key-tracked LFOs. Might be a little harsh for some people out there but I think it creates some really interesting tones"
В двух словах, он предлагает поиграться с gainstaging т.к. ответ фильтра зависит от входной громкости осцилляторов.
Хотя, как я его понял, это все скорее в контексте всяких трюков с self oscillation и filter FM, а не простых и всем привычных звуков, типа муговых басов, плаков и секвенций в стиле 303.
И видео из поста с filter FM (там конечно своеобразные звуки извлекаются)