Chapter 9—Supplemental Information
4 ENSONIQ MR-Rack Musician’s Manual
Regeneration
A signal routing in which some of the output is mixed back into the input. The feedback of a
delay line is also referred to as “regeneration.”
Resonant Peak
The frequency selected in an equalizer or filter. Also referred to as “Q.” It may be as narrow as a
single frequency or broadened to include adjacent frequencies.
Reverb
Multiple echoes and reflections which combine to create an ambient effect that fades to silence in
imitation of the manner in which sound naturally decays. Different devices have been used to
simulate these ambiences: springs, plates, tubes, and chambers. The MR-Rack uses digital
processing to create new environments and simulate these classic ambiences.
RPN
For “Registered Parameter,” a set of MIDI Controller values used for the adjustment of various
pitch bend and tuning parameters.
Sample
A digital recording used as the basic building block of MR-Rack Sounds.
Signal
A general term for sound.
Sound
In the MR-Rack, “Sound”—with a capital “S”—is a collection of up to 16 layers of samples.
Sound Wave
A periodic disturbance in air pressure that causes the eardrum to vibrate in response.
Split
A grouping of Sounds wherein each Sound responds only to notes played within a specific
keyboard range.
Stak
A group of Sounds whose Parts are assigned to the Stak MIDI channel. Sounds assigned to the
Stak MIDI channel respond to MIDI data received on the Stak MIDI channel, allowing them to be
layered with each other, split into separate keyboard regions, or a combination of both.
Standard Sound
A normal, non-Drum Kit MR-Rack Sound. Each standard Sound can have up to 16 sound layers.
Sync LFO
An MR-Rack LFO whose rate is synchronized to the MR-Rack’s system clock.
SysCTRL
Synonym for “System Controller.”
System Clock
A built-in reference pulse generated by the MR-Rack for the synchronizing of LFO and Noise
modulators used in Sounds and Effects. The system clock can be set to a fixed value or
synchronized to received MIDI clocks.
System Controller
Any of four special assignable MIDI controllers available in the MR-Rack, useful for enabling
system-wide MR-Rack response to non-standard MIDI controllers. Each System Controller may
be set to any MIDI controller number (000-127), and may be used in the modulation of Sounds
and Effects.
Transient
A quick, momentary burst of high-amplitude sound.
Value
An MR-Rack parameter’s setting.
Voltage-Controlled
Filter
A filter whose cutoff frequency is modulated by input voltage. Useful for creating distortion, wah
wah, and envelope (auto-wah) Effects.
XLR Connector
A type of professional audio connector, with three pins: Pin 1 is the ground reference, Pin 2
carries the “hot” signal, and Pin 3 carries the anti-phase “cold” signal. Designed for use with
balanced inputs and outputs.
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