if you put the spacing into the negatives in highpass/lowpass mode, do you get a band reject filter?
if you do then that’s cool!
Nope. A band reject filter is the result of placing a HPF and LPF in parallel, and summing the outputs. If the cutoff frequencies don’t overlap, a band reject (AKA notch) filter response results. Since the Voyager filters are in series, you always get a band pass response when the filter is set to HIGHPASS/LOWPASS.
In HP/LP mode, the width of the bassband is set by the spacing control. When the spacing control is set to -3, the passband is widest. When the spacing control is set to +3, the passband is at its narrowest.
Greg
that’s a shame they should release a moogerfooger filter with one switch selecting between funtcion A or B and the othe selecting between:
in A mode, lowpass or highpass
in B mode, bandpass or band reject
then have cutoff, resonance, spacing, and mix (or something) as the four CV controlable knobs.
You are referring to a multi-mode filter. Electrix made one - called the Filter Factory - which was 2 pole stereo or four pole mono. I have one, and it’s a nice addition to my Voyager rig.
I’m sure there are others out there (Sherman Filterbank?) as well as offerings from the modular synth manufacturers (Modcan, MOTM, etc.). You might want to look into these.
Greg