CHAPTER 21. LIVE AUDIO EFFECT REFERENCE
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source. Randomizing pitch and delay time can create complex masses of sound and rhythm
that seem to bear little relationship to the source. This can be very useful in creating new
sounds and textures, as well as getting rid of unwelcome house guests, or terrifying small
pets (just kidding!).
To refer delay time to the song tempo, activate the Sync switch, which allows using the Delay
Time beat division chooser. The numbered switches represent time delay in 16th notes. For
example, selecting 4 delays the signal by four 16th notes, which equals one beat (a quarter
note) of delay. With Sync Mode active, changing the Delay Time eld percentage value
shortens and extends delay times by fractional amounts, thus producing the swing type
of timing effect found in drum machines.
If the Sync switch is off, the delay time reverts to milliseconds. In this case, to edit the delay
time, click and drag up or down in the Delay Time eld, or click in the eld and type in a
value.
You can route each parameter to the X-Y controller's horizontal or vertical axis. To assign a
parameter to the X-axis, choose it from the parameter row below the controller. To assign a
parameter to the Y-axis, use the parameter row on the left side.
The Feedback parameter sets how much of the output signal returns to the delay line input.
Very high values can lead to runaway feedback and produce a loud oscillation watch your
ears and speakers if you decide to check out extreme feedback settings!
You can transpose the grain pitch with the Pitch parameter, which acts much like a crude
pitch shifter.
The Spray control adds random delay time changes. Low values smear the signal across
time, which adds noisiness to the sound. High Spray values completely break down the
structure of the source signal, introducing varying degrees of rhythmic chaos. This is the
recommended setting for anarchists.
The Random Pitch control adds random variations to each grain's pitch. Low values create
a sort of mutant chorusing effect, while high values can make the original source pitch
completely unintelligible. This parameter can interact with the main Pitch control, thus
allowing degrees of stability and instability in a sound's pitch structure.
The size and duration of each grain is a function of the Frequency parameter. The sound of
Pitch and Spray depends very much on this parameter.
