ENSONIQ DP/4+ User Manual

Glossary
ENSONIQ DP/4+ Reference Manual VII
Pre-emphasis This is a noise reduction technique commonly used to control noise in tape recorders.
Hiss is most objectionable in the higher frequencies of a signal. Pre-emphasis boosts the
treble going into the effect, and a de-emphasis circuit cuts the treble (by an equal
negative amount) to its original signal — while at the same time removing hiss from the
frequencies where it is most objectionable.
Preset A preset is a combination of an algorithm (or algorithms) and the associated parameter
settings. You select a preset to put different effects into the Units. Selecting a preset may
load effects into Units A, B, C, and/or D. Presets affecting more than one unit also
contain signal routing information.
There are four types of presets in the DP/4+. They differ in how many units are affected,
and how many routing parameters are remembered. The type(s) of presets available for
selecting depends on the current Config. The four preset types are:
Preset Type: Affects: Routing Parameters remembered:
(1U) 1 Unit Preset One Unit None
(2U) 2 Unit Preset Two Units Connections between 2 units
(4U) 4 Unit Preset Four Units Connections between all 4 units
(Config) Config Preset Four Units All routing and configuration params
As the number of Units in a preset increases
there are more routing parameters included.
1 Unit 2 Unit 4 Unit ConfigPreset Type:
2U Routing
parameters
Config
parameters
Unit data Unit data
Unit data
4U Routing
parameters
Unit data
Unit data
Unit data
Unit data
4U Routing
parameters
Unit data
Unit data
Unit data
Unit data
Algorithm & Parameters
Unit data
The Unit data portion of a
preset contains the algorithm
and all of its parameters
There are 400 presets in the DP/4+; 100 presets (storage locations) for each type of preset.
The first 50 presets (00 to 49) are user programmable (battery backed up RAM). Presets
50 to 99 are ROM factory presets:
50 1 Unit
ROM presets
50 1 Unit
RAM presets
Preset
Number
1 Unit 2 Unit 4 Unit Config
99
00
49
50
Preset Type
50 2 Unit
ROM presets
50 2 Unit
RAM presets
50 4 Unit
ROM presets
50 4 Unit
RAM presets
50 Config
ROM presets
50 Config
RAM presets
The RAM presets are loaded with factory defaults when the unit is shipped and
whenever it is reinitialized. These default presets may be recalled into RAM at any time
using a special command described in the System•MIDI section.

ENSONIQ DP/4+ Specifications

General

Brand	ENSONIQ
Model	DP/4+
Category	Recording Equipment
Language	English