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Professional Audio Products Data Sheet

MPE 14 & MPE 28

PROGRAMMABLE EQUALIZERS

Features

•   128 MEMORIES WITH DIRECT RECALL
•   REALTIME DYNAMIC CONTROL VIA MIDI
•   CURVE COMPARE, WEIGHTING & COPYING
•   “SNAPLESS” EQ CURVE RAMPING
•   MIDI SYSEX CURVE EDITING
•   SEPARATE EQ AND SYSTEM DISPLAYS
•   INTERPOLATING CONSTANT-Q FILTERS

•   +12/-15dB RANGE IN 1dB STEPS
•   INDIVIDUAL BYPASS SWITCHES
•   BALANCED 3-PIN & ¼" IN/OUT
•   NON-VOLATILE MEMORY
•   TWO-LEVEL ACCESS SECURITY SYSTEM
•   UL/CSA REMOTE POWER SUPPLY
•   DOS EDITOR PROGRAM AVAILABLE

General Description

The MPE 14, two-channel, 14-band, 2/3-octave, and the

MPE 28, one-channel, 28-band, 1/3-octave MIDI program-

mable equalizers begin a generation of automated signal

processing from Rane Corporation.

Sound Contracting

: Presets can be stored for varying

room configurations, and recalled via front panel, or external

contact closures with the Rane RPS 4 Remote Program

Selector (converting switch closures to MIDI program change

commands). Access security can be maintained in two levels

of front panel lockout.

Live Performance:

 The MPE series interface to any

MIDI controller or sequencer, allowing not only program

changes, but also curve modification in real time through the

use of MIDI System Exclusive (SYSEX) messages.

MIDI Studios: 

Not only can the MPEs overcome defi-

ciencies in synthesizer and drum machine voices, they also

add a new musical dimension: 

Expression

. The MPEs respond

to expression controllers such as MIDI continuous controllers

or channel pressure aftertouch. This feature allows dynamic

control and continuous modification of the EQ curve. Bend

your bass or tweak your treble; it’s now at your fingertips, in

real time.

The MPEs are digitally controlled analog equalizers. Start

with Rane’s proven equalizer performance. Put it under the

powerful control of a 16-bit, 16MHz microcontroller. Pro-

gram the microcontroller to provide full MIDI implementa-

tion, including SYSEX. Add it all together and you get an

unbeatable programmable equalizer. The MPEs utilize Rane’s

exclusive Interpolating Constant-Q filter technology. The

same design used in the commercial grade model GE 30 for

smooth, consistently accurate performance, and minimum

interaction. The MPEs are fitted with fully balanced Inputs

and Outputs using both 3-pin and ¼" TRS connectors.

The MPEs allow the user to store 128 equalization curves

recalled by either the front panel controls, MIDI commands,

another MPE, a Rane RPS 4, or from a computer. DOS

software is available from the factory (at no charge) that

allows graphic editing of the MPE. Other software companies

produce MPE Editor/Librarians, such as Opcode Systems

(Galaxy) and Mark of the Unicorn (Unisyn and X-oR).

The MPEs also feature decimal and octal program display,

program mapping, curve weighting, ramping, copying, and a

wealth of usable factory EQ presets. Please consult the 

MPE

Users Guide

 (available upon request) for further information

on these and other advanced features.

MPE 14 & MPE 28 MIDI Programmable Equalizers

Rane MPE 28 Editor DOS Program Screen

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