User Guide

HIGHPASS LOWPASS MODE:

In Highpass/Lowpass mode, the Voyager’s filters are configured as a lowpass and highpass filter

in series, summed to both outputs. As with the dual lowpass mode, the Cutoff control changes

the cutoff frequency of both filters, and the spacing sets the frequency difference between the

highpass filter and lowpass filter. The spacing between the two filters creates a bandpass filter

(figure 21). The Resonance control affects only the lowpass filter, thus making for some terrifically

interesting filter sounds.

CUTOFF:

The Cutoff knob is the main filter control. This sets the cutoff frequency of both of the filters in the

both Dual Lowpass and Highpass/Lowpass mode.

In Dual Lowpass mode, the frequencies to the right of the indicator on the knob are the

frequencies that are filtered out. The frequencies to the left of the indicator are the frequencies

that are allowed to pass through the filter. This is why as you turn the control clockwise the cutoff

frequency becomes higher and the sound becomes brighter. Of course to hear the effect of a

lowpass filter it helps to have a signal rich in harmonics which provides high frequencies to filter. A

good example of a sound rich in harmonics is a sawtooth waveform.

In Highpass/ Lowpass mode, the combination of highpass and lowpass filters forms a bandpass

filter. The Cutoff control changes the center frequency of the passband.