Lexicon MPX 550 User Manual
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Lexicon MPX 550 User Manual

Lexicon user guide 24-bit dual channel processor
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  • Page 2: Important Safety Instructions

    • Do not attempt to service the unit yourself as opening or removing covers may expose you to dangerous voltage, and will void the Limited Warranty. Only a qualified technician or an authorized lexicon distributor should perform servicing. • To prevent electric shock, do not remove the grounding plug on the power cord, or use any plug or extension cord that does not have a grounding plug provided.
  • Page 3 Fax 781-280-0499 (Service) This document should not be construed as a commitment on the part of Lexicon, Inc. The information it contains is subject to change without notice. Lexicon, Inc. assumes no responsibility for errors that may appear within this document.

  • Page 4: Table Of Contents

    Informações Importantes ao usuário..xiv Section 1: Getting Started About the MPX 550 ......1-2 Highlights Front Panel Overview .
  • Page 5 MPX 550 Section 3: System Mode System Mode Functions ..... 3-2 Parameters • MIDI Dumps • Restore Default Commands Section 4: Program Descriptions Single Programs.

  • Page 6: Us Important Safety Instructions

    Vorhandensein nicht isolierter gefährlicher Spannung im Gerät. Diese Spannung kann so hoch sein, dass das Risiko eines Stromschlags besteht. ü Dieses Dreieck, welches auf Ihrem Bauteil angebracht ist, macht Sie auf wichtige Betriebs- und Wartungshinweise in diesen Hinweisen aufmerksam. Lexicon DEUTSCH Diese...

  • Page 7: Es Instrucciones De Seguridad Importantes

    MPX 550 ESPAÑOL INSTRUCCIONES DE SEGURIDAD IMPORTANTES Guarde esta instrucciones para uso posterior. • Utilice siempre el voltaje correcto. Diríjase a las instrucciones de operación del fabricante para obtener las especificaciones de potencia. Esté al tanto de que voltajes de operación distintos requieren el uso de cables y/o enchufes distintos.

  • Page 8: It Importanti Norme Di Sicurezza

    Este triângulo que se aparece em seu componente o alerta à presença de uninsulated, voltagem perigosa dentro do enclosure - voltage que pode ser suficiente para constituir um risco de choque. Este triângulo que se aparece em seu componente o alerta a operando importantes e instruções de manutenção nesta literatura acompanhante. Lexicon...

  • Page 9: Dk Vigtig Information Om Sikkerhed

    MPX 550 DANSK VIGTIG INFORMATION OM SIKKERHED Gem denne vejledning til senere brug. • Følg alle anvisninger og advarsler på apparatet. • Apparatet skal altid tilsluttes den korrekte spænding. Der henvises til brugsanvisningen, der indeholder specifikationer for strømforsyning. Der gøres opmærksom på, at ved varierende driftsspændinger kan det blive nødvendigt at bruge andre lednings- og/eller...

  • Page 10: No Viktig Informasjon Om Sikkerhet

    Denna triangel, som visas på din komponent, varnar dig om en oisolerad farlig spänning inne i enheten. Denna spänning är eventuellt så hög att fara för elstöt föreligger. Denna triangel, som visas på din komponent, anger att viktiga bruksanvisningar och serviceanvisningar ingår i dokumentationen i fråga. Lexicon SVENSKA...

  • Page 11: Us Important User Information

    MPX 550 Important User Information Lexicon is pleased to present its user guides on CD-ROM. By utilizing CD-ROM technology we are able to provide our documentation in multiple languages. The printed edition of the user guide is in English only.

  • Page 12: De Wichtige Benutzerinformation

    Introduction Wichtige Benutzerinformation Lexicon ist erfreut, seine Benutzerhandbücher nun auch auf CD-ROM vorlegen zu können. Durch den Einsatz von CD-ROM-Technologie können wir unsere Dokumentation in verschiedenen Sprachen zur Verfügung stellen. Die gedruckte Ausgabe des Benutzerhandbuchs ist nur in englischer Sprache verfügbar. Die beigelegte CD-ROM enthält das Benutzerhandbuch in verschiedenen...

  • Page 13: Es Información Importante Para El Usuario

    MPX 550 Información importante para el usuario Lexicon se complace en presentar sus manuales de usuario en CD-ROM. Gracias a la utilización de la tecnología de CD-ROM, nosotros podemos ofrecer nuestra documentación en múltiples idiomas. La edición impresa del manual del usuario sólo está...

  • Page 14: Fr Important - Informations Utilisateur

    Prenez le temps de lire les informations relatives à la sécurité. Pour obtenir de plus amples informations sur Lexicon, Inc., nos produits et notre service clientèle, consultez notre site web à l’adresse : www.lexicon.com. Contenu de l’emballage et inspection Après avoir ouvert l’emballage, conservez-le pour tout...

  • Page 15: It Importanti Informazioni Per L'utente

    MPX 550 Importanti informazioni per l’utente Lexicon è lieta di presentare i propri manuali su CD- ROM. Utilizzando la tecnologia su CD-ROM siamo stati capaci offrire la nostra documentazione in più lingue. L’edizione stampata del manuale è solamente in inglese.

  • Page 16: Pt Informações Importantes Ao Usuário

    Introduction Informações Importantes ao usuário A Lexicon tem o prazer de apresentar o Guia do Usuário em CD-ROM. Através da tecnologia CD-ROM temos a possibilidade de fornecer nossa documentação em vários idiomas. A versão impressa do Guia do Usuário está apenas em Inglês.
  • Page 17 About the MPX 550 ........1-2 Highlights Front Panel Overview .

  • Page 18: About The Mpx 550

    Getting Started ABOUT THE MPX 550 Thank you for purchasing the MPX 550 Dual Channel Processor, featuring Lexicon’s proprietary Lexichip®. The MPX 550 is a true stereo, dual-channel processor with 24-bit internal processing, analog-to-digital conversion, and digital-to-analog conversion. It offers 255 presets with classic Lexicon reverb, including Tremolo, Rotary, Chorus, Flange, Pitch, Detune, 5.5...

  • Page 19: Highlights

    MPX 550 HIGHLIGHTS • Lexicon’s proprietary Lexichip • World-class Lexicon reverb • 24-bit internal processing • 24-bit analog-to-digital conversion • 255 presets • 64 user programs • Mastering Dynamics algorithm • Large, graphic front panel display • Four EDIT knobs for simple parameter adjustment •...

  • Page 20: Front Panel Overview

    3. System Toggles between activating and deactivating System Mode. When System Mode is activated, EDIT knob 1 selects parameters; EDIT knob 3 changes the setting of the selected parameter. (See Section 3 for more information about System Mode.) Lexicon...
  • Page 21 MPX 550 4. EDIT Knobs Adjust parameters. Numbers 1 to 4 correspond to numbers 1 to 4 beneath the front panel display. 5. Front Panel Display Indicates information about the current program. (See page 1-6 for more information about the front panel display).

  • Page 22: Front Panel Display

    It is also calibrated in 2dB increments per pixel. 2. Input/OVL Indicator Reflects the input type in normal operation. The first letter indicates input type, which is selected with the System Mode parameter Input Source (see page 3-4). Lexicon...
  • Page 23 MPX 550 "S" stands for stereo, "L" stands for mono left, "R" stands for mono right, and "D" stands for digital. "NoD" appears when digital input is selected, but no valid digital audio signal is present. The number after the letter indicates the sample rate (44.1 or 48kHz).

  • Page 24: Rear Panel Overview

    MIDI IN and software-selectable MIDI OUT/THRU. 3. FOOTSWITCH Allows footswitch control of front panel Bypass and Tap functions. A 1/4 inch Tip/Ring/Sleeve connector and a momentary contact footswitch are available. (See page 1-10 for more information.) Ring Lexicon Sleeve Ring Sleeve Bypass...
  • Page 25 MPX 550 4. S/PDIF IN and OUT Provide digital audio input and output. Two RCA S/PDIF connectors are available. The unit accepts inputs at 44.1 or 48kHz. 5. ANALOG OUTPUTs Provide analog audio output. Balanced outputs are available on either XLR or 1/4 inch Tip/Ring/Sleeve connectors.

  • Page 26: Connecting The Unit

    Getting Started CONNECTING THE UNIT The INPUT and OUTPUT connectors on the MPX 550 are 1/4 inch Tip/Ring/Sleeve and XLR sockets. Either may be used. Connections should be made utilizing high-quality shielded cables. The MPX 550 produces effects from either mono or stereo sources.
  • Page 27 Getting Started MPX 550 TYPICAL CONNECTIONS TO A CONSOLE LEFT Out RIGHT Out LEFT In RIGHT In Aux Send 1 Aux Send 2 1-11...

  • Page 28: Setting Audio Levels

    System Mode. Output Level, the first System Mode parameter, will be displayed. 2. Turn EDIT knob 3 to set the Output Level parameter. Unity gain for a +4dBu input device should be -12dB. 3. Press the System button again to deactivate System Mode. Lexicon...

  • Page 29: Basic Operation

    Basic Operation Selecting and Loading Programs ......2-2 Editing Programs ........2-3 The “Adjust”...

  • Page 30: Section 2: Basic Operation

    3/4 second after the PROGRAM knob stops turning. To do this, set the System Mode parameter Auto Load to Enabled (see page 3-7). Turn the PROGRAM knob counterclockwise to cycle backward through all programs. Lexicon Press and turn the PROGRAM knob to select a program bank.

  • Page 31: Editing Programs

    MPX 550 EDITING PROGRAMS Each program features up to 20 parameters, which are organized into Edit Pages with as many as four parameters each. Press the front panel Edit Pages button to cycle through available Edit Pages for the loaded program.

  • Page 32: Storing Programs

    Basic Operation STORING PROGRAMS The User Bank contains no programs when the MPX 550 is shipped. However, it includes 64 memory locations available for storing user-modified programs. To store a program: 1. Press the Store button. The Store and Tap/Cancel LEDs will light to indicate that the store function is armed.

  • Page 33: The Compressor

    MPX 550 THE COMPRESSOR The compressor is available in all programs, except Dynamics. (Dynamics uses a different compression mechanism, explained on page 4-33.) The compressor sits in the wet component of the signal in front of the effects in the loaded program. It is controlled with four...

  • Page 34: Tap Tempo

    2. Still holding the Tap/Cancel button, play two short notes in rhythm. 3. Release the Tap/Cancel button. The message "Knob 3 to change" will appear at the top of the front panel display to indicate that EDIT knob 3 is now available to adjust tempo. Lexicon...

  • Page 35: Bypass

    MPX 550 4. If desired, turn EDIT knob 3 to further adjust tempo in bpm (beats per minute). 5. Press the Tap/Cancel button to exit this mode. Audio tap is a must for live performances. It offers a simple method of setting delay times and modulation rates to match the music.

  • Page 36: System Mode Functions

    System Mode System Mode Functions ....... 3-2 Parameters • MIDI Dumps • Restore Default Commands...
  • Page 37 S/PDIF Digital Clock Source Internal 44.1kHz* Internal 48kHz External (S/PDIF) Digital Output Processed* Mix Mode Program* Global Bypass Mode Dry* Full Mute Input Mute Program Load Mode Bypass Dry* Full Mute Tempo Mode Program* Global Compressor Mode Program* Global Lexicon...
  • Page 38 MPX 550 Parameter Settings MIDI Patches Enabled* Disabled MIDI Channel 1* to 16 Omni MIDI Program Change Enabled* Disabled R1-MPX1 MIDI Clock In Enabled* Disabled MIDI Out/Thru Out* Thru Operating Mode Normal* Demo Locked Memory Protect Enabled Disabled* Auto Load...
  • Page 39 S/PDIF input signal, even if an analog source is used. "NoD" will appear in the lower-left corner of the front panel display if no valid digital input signal is present to utilize for the external clock. Clock Source parameter Lexicon will...
  • Page 40 MPX 550 Digital Output Selects the source for the digital output. When set to Processed, the digital output is the same as the analog outputs. Its mix level will reflect the current setting of the Mix parameter. When set to Dry, the digital output is the input.
  • Page 41 Disabled, the unit ignores Learned Patches, preventing accidental changes. MIDI Channel Selects the MIDI Channel for MPX 550 messages. When set to Off, the unit ignores messages sent on all MIDI channels. When set within a range of 1 to 16, the unit responds to messages sent on the selected MIDI channel.
  • Page 42 MPX 550 • The front panel PROGRAM knob is still available for selecting user programs only. Programs stored in the User Bank are still available, but cannot be modified. • The System Mode parameter Auto Load is set to Enabled.

  • Page 43: Midi Dumps

    Dump System Data Executes a MIDI Dump of all System Mode settings and Learned Patches. Press the front panel Store button to execute the dump. When dumped back, the System Mode settings and Learned Patches will take effect immediately. Lexicon...
  • Page 44 System Mode MPX 550 RESTORE DEFAULT COMMANDS Clear User Bank Arms a procedure to erase the contents of the User Bank. Press the front panel Store button to execute this procedure and return the User Bank to its factory-default condition. This procedure cannot be executed when a User program is running or when the System Mode parameter Memory Protect is set to Enabled.
  • Page 45 Single Programs ........4-2 Plate •...

  • Page 46: Single Programs

    Plate Programs Small Plate Medium Plate springs. Large Plate Tap PreDelay Tape Slap Rich Plate Large&Bright VocalPlate Drum Plate Lexicon "Adjust" (Livenes) – (Livenes) – (Livenes) – (MidRT) PreDelay (1/32 Note) (ips) –...
  • Page 47 MPX 550 GATE/INV Gated reverbs were created by feeding a reverb, such as a metal plate, through an analog gate device. Decay time was set to instant, while hold time varied duration and sound. The Gate programs provide a fairly constant sound with no decay until the reverb is cut off abruptly.
  • Page 48 Program Descriptions HALL Lexicon’s Hall programs recreate the acoustics of actual places - from grand, reverberant enclosures to small concert halls. The clean reverberation of Hall programs is designed to add spaciousness without altering source material. In addition to general instrumental and vocal applications, the Hall programs give separately recorded tracks a sense of belonging to the same performance.
  • Page 49 MPX 550 CHAMBER Historically, recording studio chambers were oddly shaped rooms with a loudspeaker and set of microphones to collect ambience in various parts of the room. Stereo Chamber programs produce even, relatively dimensionless reverberation with little color change as sound decays.
  • Page 50 42 Small Amb (HighCut) 43 MidSizeAmb (HighCut) 44 Studio "D" (HighCut) 45 Bright Amb (Decay) 46 Dark Amb (Decay) 47 MarbleFoyer (Livenes) 48 Smooth Amb (Decay) 49 Guitar Amb (HighCut) Lexicon – – – – – – – – – –...
  • Page 51 MPX 550 ROOM Room programs simulate actual rooms where there is a strong sense of being in a small, live place. These programs are useful on drums and percussion, and can also be applied to electric guitar tracks. Program Descriptions Room Programs "Adjust"...
  • Page 52 Tremolo is essentially a rhythmic effect. Tremolo Programs "Adjust" 60 RectSine Tap (Phase) 61 Square Tap (Phase) 62 Sine TapTrpl (Phase) 63 Triangle (Phase) 64 Sawtooth (Phase) Lexicon Rate (1/8 Note) Rate (1/8 Note) Rate (1/4 Note) – –...
  • Page 53 MPX 550 ROTARY Rotary speaker cabinets were designed to provide a majestic vibrato/choir effect for electronic theater and church organs. The most well-known rotary speaker is the Leslie™ Model 122, which has two counter-rotating elements: a high-frequency horn and a low-frequency drum with slow and fast speeds.
  • Page 54 Chorus effects are also often combined with plates, echoes, and other reverb effects. The stereo Chorus programs, inherited from Lexicon’s PCM 80, create a rich, airy effect that simulates the sound of multiple sources from a single source. These programs are stunning on acoustic or clean electric guitar.
  • Page 55 MPX 550 FLANGE Flange effects were originally created by simultaneously playing back identical programs on two tape recorders, then using hand pressure against the flange of the tape reels to slow down first one machine, then the other. The result was a series of changing phase cancellations and reinforcements, with characteristic swishing, tunneling, and fading sounds.
  • Page 56 Set the Mix parameter to Wet to achieve the full effect of these programs. 4-12 Detune Programs "Adjust" 80 Detune Mild (Dtuning) 81 Detune (Dtuning) Med&Warm 82 Detune Heavy (Dtuning) 83 Det Xtreme (Dtuning) 84 Pitch Detune (Dtuning) Lexicon – – – – –...
  • Page 57 MPX 550 PITCH Altering the pitch of a sound produces a wide range of effects - from subtle detuning, to harmonies, to chords. The stereo polyphonic Pitch programs can be used to shift program material or monophonic sources within a range of one octave up to two octaves down.
  • Page 58 "Adjust" parameter determines the delay time. With all delay and echo effects, note the way the repeats fall rhythmically to the beat. The most effective delay and echo patterns are those that lock with the tempo of the music. Lexicon Delays Echoes...
  • Page 59 MPX 550 In all delay programs and dual programs, the unit uses the MstrDly parameter to scale delay times that are not controlled by Tempo. In some programs, the "Adjust" parameter controls MstrDly. MstrDly can be set within a range of 0 to 100%. It is usually set to 100% in most presets.

  • Page 60: Special Fx

    (HighCut) (Dtuning) (Resnce) (HighCut) (Time) (Level) (Decay) (Decay) (Resnce) (Width) (Delay) (FeedBk) (Pitch) (FeedBk) (Diffusn) Lexicon – Speed (Whole Note) – Rate (Drum/Horn) Echo – – – – Delay Time Dly Time, Pan Rate – Delay Time (Whole Note) –...

  • Page 61: Stereo Stage

    Stereo Stage provides stereo reverb while preserving the dry signal. To use this program, note the following: • Use the MPX 550 in line between the mixer and house amplifiers - not as an effect mixed back into the main left and right channels on the mixer.

  • Page 62: Dual Programs

    The other effect (e.g. Delay) receives input from the right channel only and sends output to the right channel only. Cascade Mono Split Flange Delay Dual Mono Flange Flange Delay Delay Lexicon...
  • Page 63 MPX 550 EFX BAL The Efx Bal parameter controls the relative balance of each effect in the dual programs. In Cascade variations, the parameter also varies the amount of the first effect or dry signal fed into the second effect.
  • Page 64 Triplet (1/8 Note) Delay Time (1/4 Note) – – Delay Time (1/4 Note) – Delay Time (1/4 Note) – Lexicon Routing Dual Stereo (Parallel) Dual Stereo (Parallel) Dual Stereo (Parallel) Dual Stereo (Parallel) Dual Stereo (Parallel) Dual Stereo (Parallel) Cascade...
  • Page 65 MPX 550 PCH-DLY Pch-Dly Programs 130 5th Tap 131 8ve 3pl Tap 132 8ve 8+3plTap 133 3rd4thPong 134 4th5th Xfeed 135 5th6th Xfeed 136 8ve > Xfeed 137 5th > Xfeed 138 MajMin > Fbk 139 StepUp > Tap Dual Stereo (Parallel)
  • Page 66 Delay Time (Time) – (Time) – (FeedBk) Delay Time (Time) – (FeedBk) Delay Time (Time) – Lexicon Routing Dual Stereo (Parallel) Dual Stereo (Parallel) Dual Stereo (Parallel) Dual Stereo (Parallel) Dual Stereo (Parallel) Dual Stereo (Parallel) Cascade Cascade Cascade Cascade Cascade...
  • Page 67 MPX 550 DLY-RVB Dly-Rvb Programs 150 Tap Small 151 3plTap MidSz 152 8+3pl Large 153 Pong Small 154 Xfeed MidSz 155 Xfeed Large 156 Tap > Room 157 8+3pl >Large 158 Xfeed > Room 159 Xfeed >Large Dual Stereo (Parallel)
  • Page 68 Speed (Whole Note) Speed (Whole Note) – – – – Speed (Whole Note) Speed (Whole Note) – – Lexicon Routing Dual Stereo (Parallel) Dual Stereo (Parallel) Dual Stereo (Parallel) Dual Stereo (Parallel) Dual Stereo (Parallel) Dual Stereo (Parallel) Cascade Cascade...
  • Page 69 MPX 550 PCH-RVB Pch-Rvb Programs 170 3rd4th Room 171 4th5th Room 172 5th6th Room 173 8ve MidSiz 174 Power MidSiz 175 Detune Room 176 Fine > Small 177 Power >Large 178 4th > MidSiz 179 8ve > MidSz Dual Stereo (Parallel)
  • Page 70 (MidRT) – (MidRT) – (MidRT) – (Livenes) – (Livenes) – (Livenes) – (MidRT) – Lexicon Routing Dual Stereo (Parallel) Dual Stereo (Parallel) Dual Stereo (Parallel) Dual Stereo (Parallel) Dual Stereo (Parallel) Dual Stereo (Parallel) Cascade Cascade Cascade Cascade Cascade Chorus...
  • Page 71 MPX 550 MSPLIT DLY MSplit Dly Programs 190 Flng + Tap 191 Flng + Pong 192 Flng + Xfeed 193 Flng + Bnce 194 DeepFl + Dly 195 5th + Tap 196 8ve + 3plTap 197 4th5th+Xfeed 198 5th6th+Xfeed 199 PchFine +Tap...
  • Page 72 (Livenes) – (Pitch) – (Pitch) – (MidRT) – (MidRT) – (Pitch) – (MidRT) – Lexicon Routing Mono Split Mono Split Mono Split Mono Split Mono Split Mono Split Mono Split Mono Split Mono Split Mono Split Mono Split Mono Split...
  • Page 73 MPX 550 MSplit Rvb Programs 221 Chor1+ Large 222 Chor2+MidSiz 223 Chor2+ Large 224 Chor3+MidSiz Note: The Mono Split routing configuration is illustrated on page 4-18. "Adjust" (MidRT) – (MidRT) – (MidRT) – (MidRT) – Program Descriptions Routing Mono Split...
  • Page 74 Speed (1/4 Note) Speed (Dotted 1/4 Note) Delay Time Delay Time Delay Time Delay Time Speed – – – – Lexicon Routing Dual Mono Dual Mono Dual Mono Dual Mono Dual Mono Dual Mono Dual Mono Dual Mono Dual Mono...

  • Page 75: Cmprssr

    MPX 550 CMPRSSR In all Cmprssr programs, the "Adjust" parameter controls gain within a range of 0 to 9.5dB. It can be used to match volume levels between the dry, bypassed, and compressed output obtained with typical music material. If the System Mode parameter Mix Mode is set to...

  • Page 76: Dynamics

    The parameter setting defines the maximum increase in signal level due to expansion. Higher settings increase the level of expansion applied. Maximum expansion is applied to signals that rise well above the expansion threshold for longer than 50ms. Lexicon (-31 to 0dB) (0.0dB to 5.89dB)
  • Page 77 MPX 550 Meters Selects between gain reduction (GR) and input level (In) metering. (See page 4-35 for more information.) COMPRESSION Compression is used to lower the overall level of sound sources that rise above an adjustable compression threshold. Compression can be used to match the levels of louder sources to those of quieter sources.
  • Page 78 Indicates output levels. The value indicates the maximum output level of the left or right channel, whichever is greater. The tick marks are placed in 3dB increments. The right most tick mark indicates 0dB or maximum output level. Lexicon (Off, Modern, Vintage)
  • Page 79 MPX 550 2. Peak Expansion Meter Indicates the level of peaks above the peak expansion threshold. Low-level peaks are shown as one or two graduated bars. Slightly higher peaks of longer duration are shown as three graduated bars. High-level peaks are shown as three solid bars.

  • Page 80: Live-Foh (Front Of House)

    For Live-FOH presets: • Edit Page 1 contains the four most essential parameters for the first effect, and Edit Page 2 contains the four most essential parameters for the second effect. Non-essential parameters have been removed from the Edit Pages. Lexicon...
  • Page 81 MPX 550 • In the delay programs, two delay level controls have been combined into the "Adjust" parameter: (Tap/ Dly). These programs contain two delays. The first is controlled by tempo and generally used to create longer delays and echoes. The second is set manually with the Delay parameter, and can be used to create a "slap"...

  • Page 82: Parameter Graphics

    Parameter Descriptions Parameter Graphics........5-2 Parameter Glossary ........5-4...
  • Page 83 Parameter Descriptions PARAMETER GRAPHICS The MPX 550 features graphic enhancements for each parameter, which appear on the front panel display whenever a parameter setting is changed. These graphics illustrate the point at which the selected setting falls within the entire parameter range, and provide a visual indication of the parameter’s function.
  • Page 84 Parameter Descriptions MPX 550 When the Mix parameter setting is changed, the graphics pictured below appear. When a delay parameter setting is changed, the graphics pictured below appear. When the Level parameter setting is changed, the graphics pictured below appear.
  • Page 85 Controls the speed at which the compressor responds when input signals increase above threshold. CmpRatio Sets the ratio of gain reduction for input signals above threshold. Lexicon (-100 to +100%) (0.2 to 4.0x) (28Hz to 19.4kHz, off) (4 to 125msec)
  • Page 86 MPX 550 CmpRels Controls the rate at which the compressor relaxes when compressed input signal levels fall. Decay (73ms to 19.61sec or 24ms to 6.53sec) Controls reverb time for mid frequency signals. In Ambience programs, Decay controls the length of the ambience "tail".
  • Page 87 The range of these parameters is from -100% to 100%, with negative values producing a polarity reversal. High settings can cause signal overload. HF Rlloff Sets the high-frequency cutoff of a low-pass filter. Lexicon (100:0% to 0:100%) (0ms to 1.198sec) (-100 to 100%) (28Hz to 19.4kHz, off)
  • Page 88 MPX 550 HighSlope and LowSlope Determine the shape of the reverb envelope for low frequencies. HighSlope and LowSlope are found only in the Gate/Inv programs. When LowSlope is set to 0, the level of low reverb remains unchanged over its duration, then cuts off abruptly.
  • Page 89 Parameter Descriptions Mix controls the ratio of unprocessed (Dry) and processed (Wet) signal in the output. When the MPX 550 is patched into a console, this parameter should almost always be set to Wet. MstrRate In Rotary programs, serves as a master rate control affecting both the horn and drum rates.
  • Page 90 MPX 550 R Dly 1, 2, 3 Sets the delay time of right voice 1, 2, or 3. The Dly/Eko effect has three independent voices on each side. Rate Controls modulation speeds. Res 1, 2 In Chorus programs, control the amount of feedback signal.
  • Page 91 Controls the level above which signals are compressed. (0 to 255) Tune 1, 2 In Detune programs, determines the amount of detuning applied to voices 1 and 2. (0 to 100ms) Lexicon (0 to 100ms) (-32 to -0dB) (0 to 100%)
  • Page 92 MPX 550 Wavform In Tremolo programs, determines volume modulation. Settings are defined as follows: Setting Description Sine Smooth modulation with polarity reversal. Rectified Smooth modulation with no polarity Sine reversal. Triangle Linear ramp up and down. Sawtooth Linear ramp up with sudden reduction.
  • Page 93 MIDI Operation Learn Mode ........6-2 MIDI Channel Assignment .

  • Page 94: Learn Mode

    Press the Store and Tap/Cancel buttons simultaneously to activate and deactivate Learn Mode. MIDI CHANNEL ASSIGNMENT A single, selectable MIDI channel is used for all MPX 550 messages. This channel can be assigned in System Mode with the MIDI Channel parameter. Note: A MIDI channel should be assigned before MIDI features are used.

  • Page 95: Program Change Messages

    255 presets and 64 user programs. The unit conforms to the use of MIDI Continuous Controller 32 to execute Bank Select messages. MPX 550 program banks are ordered numerically from 0 to 27, beginning with the Plate Bank. (See the table at the right for additional bank numbers.)

  • Page 96: Continuous Controllers

    The front panel display will indicate the current patch on the selected control. 3. Send the MIDI Program Change message to the MPX 550. The front panel display will indicate the new patch on the control, and "Stored" will appear briefly in the message area.
  • Page 97 MPX 550 2. Turn the desired EDIT knob or press the desired button on the front panel. The front panel display will indicate which control is selected, as well as the current controller range. 3. Select the desired controller using one of the following methods: A.

  • Page 98: Midi Clock

    Tempo. Connect a MIDI device that outputs MIDI Clock, such as the MPX R1 foot controller or a MIDI sequencer, to the MPX 550 MIDI IN connector to have the MPX 550 automatically recognize and begin to process MIDI Clock messages.

  • Page 99: Sysex Messages

    MIDI Sysex messages can be used to access all algorithm parameters. More information about using this advanced feature with the MPX 550 and other Lexicon products is available at www.lexicon.com. The website offers instructions, sample messages, and a complete table of parameter Sysex addresses.

  • Page 100: Midi Implementation Chart

    Pitch Blender Control Change Transmitted Recognized 1-16 Mode 2 X (Off=9n, v=0) Lexicon Remarks Selected in System Mode Used as controller Selected in System Mode Used as controller Learned 1 to 119 (0 to 32 used as Bank Select) Learned...
  • Page 101 16 to 127 ignored; Program Change messages 1 to 15 = Program Change messages 1 to 16 for selected program bank as applicable * Lexicon ID = 6; Product ID = 22 (decimal); Device ID = MIDI Channel 0 to15 = 1 to 16 Selectable...

  • Page 102: Specifications

    Appendix Specifications ........A-2 Declaration of Conformity .

  • Page 103: Specifications

    MIDI Interface Connectors IN, OUT/THRU Power Requirements 90 to 250V, 50 to 60Hz; 12.5W, 3-pin IEC connector Specifications are subject to change without notice. Lexicon Dimensions (W x H x D) Width 19 inches (483mm) Height 1.75 inches (45mm) Depth...
  • Page 104 Date: DECLARATION OF CONFORMITY 73/23/EEC, 89/336/EEC, and 93/68/EEC EN 55103-1, EN 55103-2, and EN 60065: 1998 Lexicon, Inc., 3 Oak Park, Bedford, MA 01730-1441 USA The equipment identified here conforms to the Directive(s) and Standard(s) specified above. Dual Channel Processor...
  • Page 105 “Adjust” Parameter ... . .2-3, 5-4 AC Input Connector ....1-8 Ambience Programs ....4-6 ANALOG INPUTs .
  • Page 106 Mono Split Configuration ...4-18 MPX 550, About the ..1-2 to 1-3 MSplit Dly Programs ..4-18, 4-27 MSplit Rvb Programs .
  • Page 107 MPX 550 Output Levels, Setting ... . .1-12 Outputs, Rear Panel ..1-8 to 1-11 OVL Indicator ....1-6 to 1-7 Parallel (Dual Stereo) Configuration .

  • Page 108: Limited Warranty

    Do not return the unit to Lexicon, Inc. without prior authorization. When Shipping a Product for Service . . .
  • Page 109 A Harman International Company 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) Lexicon Part No. 070-14912 | Rev 1 | 02/02...
  • Page 110 This card lists the dry tracks included on the CD-ROM enclosed with this user guide. A Harman International Company Percussion Bass Drum ..... .(0:30) Snare Drum 1 .
  • Page 111 Voice Female Vocal 1 ....(0:43) Female Vocal 2 ....(0:56) Female Vocal 3 .

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