C-2 Voltage Controlled Delay Line
Video
X is audio input
Y is delay time
Z is feedback (bipolar)
A is delay output
B is delay output plus input signal
Parameter Min Max Default Description
0 -32 32 0 Applies an offset to the Y input.
1 -32 32 32 Attenuator for the Y input.
2 0 1 0 Enable saturation.
This algorithm is a voltage controlled delay line, with a maximum delay time of just over 200ms.
As well as simple echoes, this can produce a wide variety of effects such as vibrato, chorus and
flange.
A control signal of 0-8V on the Y input sets the delay time, with a linear voltage/time relationship.
Parameter 0 can be used to set this to a 'centre' value, which makes it easier to patch in an LFO to
the Y input without having to add a DC offset to the LFO.
Parameter 1 is an attenuverter for Y, applied before the offset.
Z is a feedback control. It is zero at 0V input, and provides negative feedback for negative voltages.
A outputs the delay signal only. Use this for vibrato effects, or if you want a controllable mix of dry
and delayed signal.
B outputs the delay and dry signals mixed in equal amounts. In combination with an LFO on the
delay time, this is the quickest route to chorus/flange type effects.
Parameter 2 enables a saturation stage on the input to the delay line. This can prevent unpleasant
distortion when the feedback becomes high, at the expense of some colouration of the sound.
C-3 Clockable Ping Pong Delay (Z feedback)
Video
X is audio input
Y is clock
Z is feedback
A is left output
B is right output
Tap tempo enabled
Parameter Min Max Default Description
0 -33 32 -33 Mix.
1 -15 8 0 Delay time multiplier.
2 -32 32 -32 Input pan.
This algorithm is a stereo ping-pong delay/echo effect, primarily intended for processing audio
signals, where the delay time is set from a clock pulse. It operates at a quarter of the standard
sample rate (i.e. at about 19kHz) and offers a maximum delay time of about 900ms.
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