77
8 BLOCKS GUIDE
BLOCK DIAGRAM: STEREO DELAY TYPES
Feedback L
Feedback R
Drive
Delay
LFOs
Diffusion
Bit Reduce
DUCK
EQ
In Gain
Delay
Diffusion
Bit Reduce
DUCK
EQ
MI
XER
Stereo Delay Parameters
Most parameters for the Stereo Delay types work the same as those for the mono types with the exception that
the wet signal is stereo-in/stereo out and several additional parameters are available.
L/R Time Ratio
– Sets the right channel time as a percentage of the left. 100% results in both channels having
equal delay time. Settings just below 100% will widen the echo sound, while ratios corresponding to whole
number relationships like 7:8 (87.5%), 3:4 (75%) or 1:2 (50%) will create syncopated rhythm.
Spread (Width)
– Controls the overall stereo image width by setting the pan position of the two delays from hard
panned (100%) to dead center (0%) to swapped hard pan (-100%).
Feedback L
,
Feedback R
– Stereo delays have independent left and right feedback controls. To preserve “tail”
balance, Feedback R will be adjusted automatically as L/R Time Ratio is adjusted. You may override automatic
settings by setting a new value manually. Negative feedback values invert the signal phase in the feedback loop.
Dual Delay Parameters
Dual Delay is identical to the Stereo Delays with the exception that left and right
delays are fully independent, with their own Time, Tempo, Level, Pan and Feedback
controls. Dual Delay features a feedback network with four separate parameters.
Feedback L->L and Feedback R->R are the normal feedback controls for each of the
two delay lines. Feedback L->R and Feedback R->L are cross-feedback controls.
This structure is illustrated in the diagram at right.
Sweep Delay Parameters
Sweep Delay uses the same algorithm as the Stereo Delay, but adds an LFO-driven stereo bandpass filter after the
outputs of the delay.
Start Freq, Stop Freq
– These controls set the range of the filter sweeps.
Resonance
– Sets the resonance of the filter. Some might describe this as the “intensity” control.
Sweep Type
– Sets the waveform of the LFO that controls the sweeps. See
“LFO Waveforms & Phase” on p.
135
.
Sweep Rate
– Sets the speed of the sweeps.
Sweep Tempo
– Locks the Sweep Rate parameter in rhythmic relation to the Tempo.
Sweep Phase
– Adjusts the phase of the right outputs of the LFO. Set above zero for stereo effects.
Delay L
FB L->L
FB R->R
FB R->L
FB R->L
Delay R
