Feedback
The Feedback controls route a portion of the output signal back
to the input. The output of these controls is mixed with the input
signal, but is independent of the gain adjustment provided by
Input Level. Gains are normalized so that, with EQ controls ap-
proximately centered, the feedback level varies from
0
to
100%
(loop gain of unity or ”infinite” sustain) as the Level knobs are
advanced from
OFF
to
MAX
.
MAIN LEVEL
— adjusts the feedback from the Main Output to
the input.
DLY ONLY
— adjusts the feedback from the Delay Only Output
to the input.
LOW EQ
— adjusts the relative level of bass frequencies
present in the feedback mix. When the knob is turned
counterclockwise, lows are cut; when turned clockwise,
lows are boosted.
HIGH EQ
— adjusts the relative level of high frequencies
present in the feedback mix. When the knob is turned
counterclockwise, and boosting them when the knob is
turned clockwise.
When both EQ knobs are centered, the frequency re-
sponse of the feedback chain is approximately flat.
Delay Only Output
Controls the delay time of the Delay Only Output. This output
only adds delay to the original input signal - the Pitch Control
section has no effect. The locking pushbuttons can be activated
in any combination. Delay times are selected in
6.25 ms
incre-
ments to a maximum of
393.75 ms
(
6.25 + 12.5 + 25 + 50 + 100
+ 200)
.
Use caution when adjusting the feedback controls until you are fully famil-
iar with their interaction.
They can easily be set to a point where loop gain exceeds unity at various
frequencies, and create uncontrolled oscillation.
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