Lexicon MPX 500 Manual de instrucciones

NEW SYSTEM MODE PARAMETER

R1-MPX 1 Mode has been added to the system parameter MIDI Program Change. This additional setting

enables the MPX 500 to respond to program change messages from a Lexicon MPX R1 Foot Controller

set to MPX 1 Mode.

Parameter Settings Default Setting

MIDI Program Change Enabled, Disabled, R1-MPX1 Mode Enabled

OVL INDICATOR SIGNALS DSP OVERLOAD

The OVL indicator located below the input meters reflects the internal processing state of the

MPX 500, not clipping of the inputs. Intermittent flashing or constant lighting of this

indicator signals the need to reduce input levels or the value of a parameter on the verge of

feedback. Input overload is indicated on the meters themselves. When input clipping occurs

on either channel, that channel’s meter changes to “inverse” video, signalling the need to

reduce input levels. The diagram pictured at left shows clipping of the left channel as well as

internal processing overload.

CHANGING SIZE AND DURATION PARAMETERS

Changing the Size parameter in Reverb and Ambience presets or the Duration parameter in Gate presets

will cause the program to reload. The program must reload in order for the unit to execute the extensive

audio re-routing associated with changing these parameters without producing unwanted noise. The

System Mode parameter Program Load Mode determines whether the MPX 500 will mute or bypass

during this reloading.

MEMORY PROTECT MODE

On page 19, the MPX 500 User Guide incorrectly states that Memory Protect Mode prevents changes to

the User Bank or the System Parameters. When enabled, Memory Protect Mode does prevent changes to

the User Bank. But it does not prevent changes to the System Parameters, nor does it prevent restoration

of MPX 500 factory-default settings. This means that Factory Init will erase any stored programs in the

User Bank.

Release Notes

MPX 500

A Harman International Company

Lexicon Part No. 070-14117 | Rev 1 | 05/01

Lexicon, Inc.

3 Oak Park

Bedford, MA 01730-1441

USA

Tel 781-280-0300

Fax 781-280-0490

www.lexicon.com

Customer Support

Tel 781-280-0300

Fax 781-280-0495 (Sales)

Fax 781-280-0499 (Service)

OVL

MPX 500 Release Notes Lexicon

ADJUST KNOB ASSIGNMENTS

The User Guide lists incorrect Adjust knob assignments for some programs. Below is a list of these

programs with their correct Adjust knob assignments:

49 HiCut

88 Inversion

103 Time (0-400ms) + Feedback

104 Time (200-1200ms) + Feedback

153 Mid-band Reverb Time

154 Mid-band Reverb Time

155 Mid-band Reverb Time

174 Mid-band Reverb Time

PARAMETERS PATCHED TO TEMPO

• The Edit knobs cannot be used to adjust parameters patched to Tempo. Some MPX 500 programs

link Tempo to certain parameters. In these programs, the message “Patched to Tempo” will appear

on the display when changes to a patched parameter are attempted.

• Both the User Guide and the previous version of these Release Notes provide lists of programs that do

not have Pre-delay patched to Tempo. Following is a complete and correct list of these programs: 3,

5, 6, 7, 63, 64, 170, 171, 172, 173, 174, 175, 176, 177, 178, 179, 210, 215, 236, 237, 238.

• A Tempo patch was added to preset 12.

PROGRAM 114: STEREO STAGE

Program 114 is now Stereo Stage, designed to supply reverb while preserving stereo imaging in a live

stage setup. Stereo imaging is preserved via time delay rather than conventional L/R panning so that a

proper channel mix is maintained in both L and R speakers.

To use this program, observe the following:

• Use the MPX 200 in-line between mixer and house amps, not as an effect that is mixed back into

the main L and R signals.

• On your mixer, pan the input channel for each musician fully to that musician’s side of the stage.

• Keep Mix set to 50% (the default setting when Program Load is set to Program).

• Adjust your Reverb level by changing the Balance parameter between full left (-50) and about

-10. (Typical values should be between -45 and -40.)

• Set "Width" for the distance between the speakers at each side of the stage. The program loads

with an assumed width of approximately 20 ft. The available range via the Adjust knob is 10-50

ft. These values assume that most audience members are seated within 30 degrees to either side

of the stage centerline. If many audience members are seated further to the sides of the stage the

Adjust setting can be increased, but otherwise it should be kept as low as possible.

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