Glossary
VI ENSONIQ DP/4+ Reference Manual
LFO An LFO (Low Frequency Oscillator) generates very low frequency waves, below the
audio spectrum, which can be used to control vibrato, tremolo, and many other effects.
Limiter A device that will prevent a source signal from going above a pre-set level (threshold). A
limiter can be thought of as a compressor with an infinite compression ratio.
MIDI Musical Instrument Digital Interface. A communication protocol for musical
instruments. MIDI has expanded the ability of the electronic musician by allowing
control, editing, and manipulation of products from different manufacturers through a
single communication protocol/network.
Mixed Stereo An output routing option of the DP/4+ that allows two separate stereo output signals to
be digitally combined into a single stereo output. The levels of the two signals are
controllable in the DP/4+.
Modulation The term used to described a real-time change to a source signal or algorithm parameter.
Modulation can be introduced within an algorithm, via MIDI events, or by using external
input devices such as the CVP-1 pedal. An important feature in creating new and
evocative sounds.
Multi-Effect An algorithm that contains more than one effect type.
Algorithm For example, EQ-Chorus-DDL.
Oscillator An oscillator is a device that emits a continuous signal of some kind. The frequency of
this signal is measured by the number of cycles that occur in a single second (cycles per
second is the same as “Hz,” or “Hertz”).
Parallel A system with multiple processors working simultaneously
Processing to achieve greater speed, efficiency, and reliability. In the DP/4+, four units are
available to work in parallel, possibly running different algorithms, and perhaps
different input sources.
Parameter Any setting of the DP/4+ which can be changed or modified is called a parameter. The
DP/4+ uses a multi-function panel through which parameters of many different types
can be selected and controlled. There are four basic types of parameters:
Algorithm parameters System and MIDI parameters for each unit
Config parameters System (Global) parameters
Parameters are available to be edited in Edit mode (for Algorithm and Config
parameters) and System•MIDI mode (for System and MIDI parameters).
In these two modes, you use the {<} and {>} buttons to scroll to the parameter you want
to modify, then use the Data Entry Knob to change the parameter’s value.
Parametric EQ An algorithm that raises or lowers specified frequency regions in program material. A
parametric EQ has variable center frequency, gain, and “Q” - the ratio of center
frequency to bandwidth.
Phaser Originally conceived as an approximation to the flange effect. Allpass filters are used in
place of the delay lines. Allpass filters introduce delay by modifying signal phase, hence
the name.