Eventide DJ Equipment DSP4000B+ 用户手册

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The Harmonizer

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 Programmer’s Manual  

Page 6 of 97 

Release 1.2.1 

 

 

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 1999 Eventide, Inc. 

 

To achieve the goals set out by the three cornerstones, we must employ four signal types.  Signals connect 

modules together.  The four signal types are: 
 

Audio Signals 

Used to pass full bandwidth audio between modules in accordance with cornerstone 
one.  Audio signals are represented numerically by a value between -1 and +1. 

 
Control Signals  

Typically used to pass parameter values between modules in accordance with 

cornerstone two.  Control signals are low speed and are updated at a variable rate, 
depending on how busy the Harmonizer is.  Control signals are represented 

numerically by a value between -32768.0 and +32767.999. 

 

Mod Signals 

Used to pass “modulation signals” between modules.  A “modulation signal” is a 1/4 
bandwidth audio signal.  Mod and audio signals may be interconnected, but not 

without a loss of signal quality.   
 

Although mod signals look like audio signals, they actually work to achieve 
cornerstone two (controlling the parameters of a module).  In some cases, control 

signals are too slow to alter a parameter without “clicking” or “stuttering."  For 
instance, if you wanted to alter a delay time quickly to produce a flange effect, a 

control signal might not be equal to the job.  Thus certain modules (moddelay for 
instance) come equipped with a mod input.  Other modules (such as the low 

frequency oscillator (LFO)) come equipped with a mod output.  By interconnecting 
the two, fast, smooth parameter adjustment can be executed that would defy control 

signals. 

 

Userobject Signals 

Used to pass 

PARAMETER

 area menu page information in accordance with 

cornerstone three. 

 
There exist module inputs and outputs for each of the four signal types.  They are named (logically enough): 

• 

audio inputs/outputs 

• 

control inputs/outputs 

• 

mod inputs/outputs 

• 

userobject inputs/outputs 

Only inputs and outputs of a similar type may be interconnected 

.  A given 

module will only have those types of inputs/outputs that are pertinent to its function.