Professional Audio Products Data Sheet
MPE 14 & MPE 28
PROGRAMMABLE EQUALIZERS
Block Diagram
Application Information
Using a Rane MPE programmable equalizer is really no
different than using any conventional equalizer. It hooks-up
the same, and you use it the same. The main difference is you
use pushbuttons instead of sliders. Another difference, of
course, is that up to 128 different curves may be set and
stored for recall at a later time. Recalled either directly using
the front panel, or remotely, using another MPE, contact
closures with a Rane RPS 4, or MIDI commands. And the
MIDI program number is displayed in either decimal or octal
format. Your choice.
Different also is the ability to program the step size
required to go from one curve to another. By ramping
between curves you avoid the snap often associated with
abrupt EQ changes. This curve ramping feature operates
similarly to dissolve in slide and video productions.
And, of course, another difference is the curve-weighting
feature. With this you can modify any new curve by a preset
curveeither factory set, or your own. So, for instance, if
you want the high-end rolled off, all you do is flatten the
system then apply the curve-weighting function to automati-
cally adjust the roll off.
Then there is the two-level security system built into all
MPEs. The first level allows users to select Stored Memories,
but not to edit them; the second level prevents all changes.
This feature alleviates many of the late-night and early
Sunday morning service calls.
And lastly, theres SYSEX. The MIDI system exclusive
remote curve editing capability allows one MPE to program
another MPE, or as many MPEs as you want. Used this way,
any MPE may be designated as a master unit and all others as
slaves. This opens up a whole new world of remote control
capabilities. The other possibility, using the powerful MPE
SYSEX code, is to allow anyone with the proper equipment
and programming ability to manipulate all curve parameters
in real time. Rane provides an MPE Editor for DOS (at no
charge) that allows graphic editing on a PC with a MIDI
interface card (laptops can be fitted with a MIDIator serial-to-
MIDI converter). Third party companies also provide MPE
support for Macintosh and Windows users.
Please see the
MPE Users Guide
for advanced applica-
tion information.
