Vermona action filter 4, Руководство пользователя

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33 Action Filter 4
EN
The filters in NOTCH-MODE
The world upside down: With MODE set to NOTCH , the filters work inverted.
FILTER A controls the lowpass while FILTER B adjusts the highpass. This wasn’t
done to annoy you but for technical and practical reasons. Here too, the “fan”
comparison might help you to understand the underlying principle: FILTER
A cuts the higher, FILTER B the lower frequencies. This results in a v-shaped
center-notch. The further the
CUTOFF marks depart (fan opens), the wider the
notch in the frequency spectrum that filters out a larger midrange section.
The frequency range being rejected by the notch filter shown as “fan”
With both CUTOFF controls pointing towards each other, both filter-signals
overlap which results in a slight emphasis in the overlapping area.
RESONANCE - nothing to boo
Resonance in a filter is achieved by internal feedback. This leads to amplifi-
cation of the frequencies around the
CUTOFF value. Resonance generates a
change of timbre that will sound synthetic with increasing intensity.
Unlike filters used in synthesizers, such as our PERfourMER MKII , the resonance
in Action Filter 4 will not reach self-oscillation. The resonance has be restricted
with intend to avoid uncontrollable feedback of the sound, especially during
live performances. No matter how you set the
Action Filter 4 , it will not damage
your gig.