SQ-80 — Musician's Manual
[FILT] FILTER PAGE
Controls the Four-Pole Low Pass Filter
(Inactive Buttons appear in White)
The outputs of the three Oscillators pass through the
Filter before going to the Final Volume stage,
[DCA4]. The Filter settings determine what frequencies will be allowed to pass through to the output.
Low Pass Filter allows only those frequencies below the Filter Cutoff Frequency to pass. Highe
frequencies are filtered out. The Filter Cutoff Frequency is set to a certain level, and then it can be
continually varied by modulating the Filter (with an
Envelope, an LFO, Velocity, etc.).
Use this page to:
1) Set the
Manual Level for the Filter Cutoff Frequency;
2) Set the amount of Filter Resonance (or Q); and
3) Modulate the Filter Cutoff Frequency, using the Keyboard "Control Voltage" and
any of the 15 available Modulation Sources.
ACTIVE CONTROLS:
1. FREQ
Sets the initial, or Manual Level of the Filter Cutoff Frequency. A higher setting will result in
a brighter sound. This setting represents the "Filter Floor
"
— the effect of any selected
Modulators will be added to (or subtracted from) this level.
Range: 0 To
127.
3. RES (Q)
Sets the amount of Filter Resonance, or Q. This controls the amplitude of the resonant peak o
the filter. When the
Q is raised, the Filter Cutoff Frequency is emphasized over all other
frequencies. By then modulating the Filter Cutoff Frequency with an Envelope,
LFO, Mod
52 Section 3 — Voice Programming
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