Understanding Dp/4 Algorithms; About The Parameters; Programming Algorithms - ENSONIQ DP/4 Musician's Manual

Section 4 - Algorithms
Section 4 - Algorithms
Understanding DP/4 Algorithms
The DP / 4 is a powerful signal processor which can produce a wide variety of algorithms
(effects). The flexible config routing scheme and the extensive parameter control give the DF /4
its dynamic effects capability.
The DP / 4 is equipped with an advanced digital signal processing system based on the ENSONIQ
Signal Processor (ESP) chip. The ESP is designed specifically for digital audio signal processing,
and in the DP /4, four ESP chips work in conjunction with 16-bit analog-to-digital and digital-to-
analog converters to provide a very high-quality output signal.
The digital effects processing has been designed to complement any input source, and all of the
algorithms can have specific parameters modulated by various MIDI and non-MIDI controllers
such as a keyboard's pitch wheel, a CV Pedal, etc.
The algorithms are fully programmable, and may be customized for particular applications.
Algorithms are stored as parts of a preset, although each algorithm can be individually selected
(in the form of 1 Unit presets). Each of these algorithms are treated a little differently, and will be
described individually on the following pages.
About the Parameters
Each algorithm in the DP / 4 contains a complete set of parameter values which determine how
that algorithm will sound. The algorithm
is
present even if the signal
is
not routed through the
effect (e.g. when the units are bypassed). Whenever you copy or save an algorithm as a preset,
the parameter settings are also saved.
The algorithm parameters are displayed by pressing the Edit button then the appropriate Unit
button, and edited by pressing the Left/Right Arrow buttons and turning the Data Entry Knob.
The parameters that pertain to each algorithm are described later in this section.
Programming Algorithms
The DP / 4 algorithms are highly programmable. There are several common parameters for every
algorithm as well as algorithm-specific parameters. The first parameter selects which algorithm
will be used. When this parameter
is
changed, a new algorithm is selected which causes several
important things to occur.
When a new algorithm is selected:
• a new program is loaded into the ESP chip, causing a brief pause in the audio output,
• the parameter screens are redefined for the particular algorithm selected, and
• the parameters are automatically set to their preset values for the new algorithm.
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