PX4 - Guitar Multi-Effects KORG - Free user manual and instructions

USER MANUAL PX4 KORG

Using the unit in the following locations can result in a malfunction.

• In direct sunlight
• Locations of extreme temperature or humidity
• Excessively dusty or dirty locations
• Locations of excessive vibration
• Close to magnetic fields

Power supply

Please connect the designated AC adaptor to an AC outlet of the correct voltage.

Do not connect it to an AC outlet of voltage other than that for which your unit is intended.

Interference with other electrical devices

This product contains a microcomputer. Radios and televisions placed nearby may experi

ence reception interference. Operate this unit at a suitable distance from radios and televi sions.

Handling

To avoid breakage, do not apply excessive force to the switches or controls.

Care

If the exterior becomes dirty, wipe it with a clean, dry cloth. Do not use liquid cleaners such as benzene or thinner, or cleaning compounds or flammable polishes.

Keep this manual

After reading this manual, please keep it for later reference.

Keeping foreign matter out of your equipment

Never set any container with liquid in it near this equipment. If liquid gets into the equipment,

it could cause a breakdown, fire, or electrical shock.

Be careful not to let metal objects get into the equipment. If something does slip into the equipment, unplug the AC adaptor from the wall outlet. Then contact your nearest Korg dealer or the store where the equipment was purchased.

CE mark for European Harmonized Standards

CE mark which is attached to our company's products of AC mains operated apparatus until December 31, 1996 means it conforms to EMC Directive (89/336/ EEC) and CE mark Directive (93/68/EEC). And, CE mark which is attached after January 1, 1997 means it conforms to EMC Directive (89/336/EEC), CE mark Directive (93/68/EEC) and Low Voltage Directive (73/23/ EEC).

Also, CE mark which is attached to our company's products of Battery operated apparatus means it conforms to EMC Directive (89/336/EEC) and CE mark Directive (93/68/EEC).

THE FCC REGULATION WARNING (for U.S.A)

This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.

Unauthorized changes or modification to this system can void the user's authority to operate this equipment.

Contents

Introduction 6

Main features 6

Turning on the power 8

Battery Low display 8

Controls and connectors 8

LCD screen 10

Making connections 11

Initial Settings 12

Quick Edit 12

Play mode 13

1. Selecting a program 13
   2.Master level 13
   3.Bypass/Mute 13
   4.Tuner 14

5.Specifying the function of the Value Dial 15
6.Key Lock function 16

Rhythm & Bass mode 16

1.Rhythm Pattern 17
2.Tempo 17
3.Bass On/Off & Bass Key 17
4. Rhythm & Bass Reverb Level ---- 18

Chain Pattern settings 18

1. Select the effect that you wish to edit 23
   2.Editing each effect 23

1) DYNA (Dynamics & Pick up Modeling) 23
2)AMP(Amp Modeling) 23
3) CAB (Cabinet Modeling) ---- 24
4) MOD (Modulation & Filter Effect Modeling) 24

5) DLY (Delay Modeling) 24
6) REV (Reverb Modeling) 25
7) NR (noise reduction) 25
8) RENAME 25
9) TX (Infrared transmitter) 26
10)WRITE 26

3.Reloading the factory programs 27

Troubleshooting 27

Effect Parameter 29

DYNA (Dynamics & Pickup modeling) 29
AMP (AMP Modeling) 31
CAB (Cabinet modeling) 34
MOD (Modulation & Filter Effect Modeling) 35
About the Intelligent Pitch Shifter 37
DLY (Delay Modeling) 38
REV (Reverb Modeling) 38

Preset Program Name 39

Rhythm Pattern List 40

Specifications 41

Introduction

Thank you for purchasing the TONEWORKS PANDORA PX4 personal multi-effect processor. In order to enjoy your PANDORA PX4, please read this owner's manual carefully and retain it for future reference.

Main features

The PX4 is a highly versatile multi-effect device in a compact package. It makes it easy to use Korg's proprietary "REIMS" modeling technology to create detailed and powerful modeling sounds.

124 types of effect variations

A maximum of seven effects can be used simultaneously.

IPE (Integrated Parameter Edit) system Easy to adjust effect settings.

50 user and 50 preset programs

Amp modeling selector and control knobs

Of the 15 different varieties, 11 types of amp models can be edited quickly and easily.

Infrared transmitter built-in

Infrared wireless headphones can be used for remote wireless monitoring.

Backlit LCD

The LCD screen can be easily viewed even in dark locations.

Auto Tuner function

This feature makes tuning fast and easy. You can also tune without being heard (i.e., while muted).

Rhythm and bass function

39 types of rhythm and bass patterns or a metronome can be sounded. Multiple patterns can also be connected for successive playback.

AUX pitch function

You can transpose the pitch of the sound from a CD player or other audio source connected to the AUX jack.

Phrase Trainer function

Sound from a CD player or guitar can be recorded (maximum of 30 seconds), and played back as a loop. The playback speed can then be slowed down without affecting the pitch of the sound. The rhythm selected in Rhythm & Bass mode and the effect output can also be recorded simultaneously.

TAP button

You can easily set the Delay Time or the tempo of the Rhythm & Bass function to match the tempo of the song.

Value dial

This lets you rapidly select programs or edit the effects.

What is REmIs?

Items (Resonant structure and Electronic circuit Modeling System) is KORG's proprietary sound modeling technology which precisely reproduces the complex character and nature of both acoustic and electric instruments as well as electronic circuits in real world environments. Items emulates a wide variety of sound generation characteristics including instrument bodies, speakers & cabinets, acoustic fields, microphones, vacuum tubes, transistors, etc.

Turning on the power

Remove the battery cover located on the bottom of the PX4 by sliding it in the direction of the ar

row. Insert four AAA alkaline batteries as shown in the illustration. Be sure to insert the batteries observing the correct polarity.

Battery Low display

When the battery begins to run down, the Low Battery icon will light. When this icon lights, replace the batteries as soon as possible.

Programs and other data (except for the data being edited) will not be lost even if the battery is removed and changed.

Batteries that have run down must be removed from the PX4. If you leave dead batteries in the unit, malfunctions (battery leakage, etc.) may occur. You should also remove the batteries when you do not expect to use the PX4 for an extended period of time.

An AC adapter is not included with this product. It must be purchased separately.

Controls and connectors

① Control knobs

These knobs control the gain, tone, and volume of the amp modeling.

Liquid Crystal Display (LCD)
③ TUNE/BYPASS button
④ EXIT button

This button returns you back to Play mode from any mode.

⑤ ENTER/REC button

This button is used to switch an effect on/off, or to start recording in Phrase Trainer mode.

⑥ Input level switch

Use this to adjust the input level (appropriate for the output level of your guitar).

⑦ Amp Modeling selector

Select the type of amp modeling.

⑧ ▲Vbuttons

Use these buttons to select programs and edit effects,

⑨ OUTPUT jack

Connect this jack to your guitar amp or headphones etc.

10 INPUT jack

Connect your guitar to this jack.

AUX jack (stereo)

Connect this jack to a CD player or other audio source.

DC4.5V

The separately sold AC adapter (DC4.5V should be connected here.

13 buttons

Use these buttons to select the parameter that you wish to edit, and to operate the Phrase Trainer function.

⑭ Power switch/Backlight switch

This switch turns the power on/off, and also turns the backlight on/off.

If you are operating the PX4 on batteries, the operating time will be shorter if you turn on the infrared transmitter or backlight.

⑤ Value dial

Use this to adjust master level, edit effects, and select programs.

16 TAP button

You can set the Delay Time by pressing this button twice at the desired tempo of delay. In Rhythm & Bass mode, you can set the tempo of the rhythm in the same way.

⑦ Mode buttons

Use these buttons to enter Rhythm & Bass, Phrase Trainer, or AUX Pitch modes.

LCD screen

① Effect chain

This area indicates the on/off status of the DYNA, AMP, CAB, MOD, DLY, and REV effects

② Program name/Effect type display

This area shows the program name or effect type. When the PX4 is bypassed or muted, this will function as the tuner.

③ Low Battery icon

This icon will light when the batteries run down.

④ Mode icons

These icons will light when you are in AUX Pitch, Phrase Trainer, or Rhythm & Bass modes.

⑤ Infrared transmitter icon

This icon will light when the infrared transmitter is on.

⑥ Edit/Original icons

The EDIT icon will light when you enter Edit mode. If the parameter or value being edited matches the value that is written in the program, the ORIG icon will light.

⑦ Program number / value display

This displays the program number. When you change the Master Level, its value will be displayed here for several seconds. During editing, this displays the parameter values.

⑧ Master/Value icons, bar graph

When MASTER is lit, the master level of the program is indicated graphically. When VAL-UE is lit, the value of the parameter is indicated graphically.

Making connections

When connecting an external device (ie-guitar amp, stereo, ac adapter, etc) be sure to turn the unit off.

1 Do not block the transmission window when using the infrared transmitter function.
2 Be sure to use only the specified AC adapter (DC4.5V-6-0).
3 If a CD player or other audio source is connected to AUX jack, you can play along on your guitar with a tape, etc. However the volume must be adjusted on the connected device.
4 Connecting cables are sold separately.
5 PX4's output jack is stereo. If you use a standard mono cable to connect it to a guitar amp etc., only the L (left) output will be heard.
6 PX4's output level and sound quality will vary depending on which headphones are used. We recommend using good quality low impedance headphones, 32 Ohms or less with a sensitivity rating near 100dB/mW or above. Many headphones sold for use with portable CD or cassette players will work just fine.

Initial Settings

1. When you finish making connections, set the power switch in the "ON" position. (This setting is referred to as Play mode.)
   Use the / buttons to select a program.
2. Set the input level switch to a position appropriate for the output level of your guitar.
   Hi: Guitars with a high output level (humbucking pickups)
   Lo: Guitars with a low output level (single coil pickups)
3. Set the volume control of the guitar to its usual position.Use the Value dial to adjust the master level.

If you want to use the infrared transmitter function, refer to p.26 of Edit mode, "9) TX (infrared transmitter).

Quick Edit

In each mode (except when Mute/Bypass or Key Lock are active), you can use the Amp Modeling selector to quickly change the amp model

ing type, or use the control knobs to adjust the gain, tone, or volume of amp modeling. When you move a control knob, the parameter name and value will appear for several seconds in the value display. If the setting matches the original setting, the ORIG icon will light.

The Delay Time of Delay Modeling can also be set by pressing the TAP button twice at the desired interval (except when in Rhythm & Bass mode). To check the Delay Time that was specified, press and hold the TAP button for two seconds or longer.

Settings that you make using Quick Edit will return to the original settings of the program if you change programs or turn off the power before Writing (see p.26).

Play mode

Play mode is the mode in which you will normally use the PX4.

1. Selecting a program

You can choose from 50 user programs (U01...U50) and 50 preset programs (P01...P50). Use the / buttons to select a program. Programs can be selected even when you are in Rhythm & Bass mode, AUX Pitch mode, or Phrase Trainer mode (except while recording).

2. Master level

When the MASTER icon is lit, the value graph will indicate the master level.

When you turn the Value dial to adjust the master level, the master level value will be shown in the program number / value display for several

seconds. The master level is remembered even when the power is turned off.

You can also adjust the settings so that the / buttons will adjust the master level. (See p.15)

3.Bypass/Mute

When you press the TUNE/BYPASS button, the PX4 will be bypassed, and the original sound will not be processed by any effect.

The effect chain will blink, and the display will indicate "BYPASS" for approximately one second.

If you press and hold the TUNE/BYPASS button for longer than one second, the output signal will be muted.

The effect chain will blink rapidly, and the display will indicate "MUTE" for approximately one second.

Bypass/mute will be turned off when you press the TUNE/BYPASS button once again.

You can also return to Play mode by pressing the EXIT button.

Bypass or Mute can also be entered from modes other than Play mode.

4.Tuner

The tuner will operate when you bypass or mute.

Play a single string on your guitar. The LCD will show the note name and the calibration. If the pitch is more than a semitone higher than the note name, a sharp symbol will appear at the upper right of the note name.

The display area will act as a meter to show the pitch.

Tune the string of your guitar so that the indicator above the center mark is lit.

The tuner (bypass/mute) will be turned off when you press either the TUNE/BYPASS button.

You can also return to Play mode by pressing the EXIT button.

Calibration

(frequency of the standard A = 440 pitch) You can use the Value dial to adjust calibration in the range of A = 438Hz 445Hz

The calibration setting you make will be valid until the power is turned off. Once the power is turned off, calibration will be reset to A = 440Hz .

1. Specifying the function of the Value Dial You can specify the function that the Value dial will perform in Play mode. In Play mode, hold down the EXIT button and press either the button or the button to assign the following functions.

Hold down the EXIT button and press the button.

The LCD will indicate "MASTER" for approximately one second.

The Value dial will adjust the master level, and the buttons will select programs. You can use the Value dial to adjust the master level quickly. Each time the power is turned on, this setting will be in effect.

• Hold down the EXIT button and press the button.

The LCD will indicate "PROGRAM" for approximately one second.

The Value dial will select programs, and the buttons will adjust the master level.

You can use the Value dial to select programs quickly.

If you want to change the function of the Value dial so that it will adjust the master level, hold down the EXIT button once again and press the button, or turn on the power once again.

6.Key Lock function

By activating the Key Lock function, you can disable all operations except for selecting programs. This is a convenient way to prevent accidental operation during a live performance.

Hold down the EXIT button and press the TUNE/BYPASS button. The LCD will indicate "KEYLOCK" for approximately one second.

The / buttons will select programs, and other buttons and the Value dial will not function.

The Key Lock function will be cancelled when the power is turned off. You can also cancel the Key Lock function by performing "5. Value Dial function setting." (p.15).

Rhythm & Bass mode

To enter Rhythm & Bass mode, press the RHYTHM button once when in Play mode (except for mute/bypass or key lock), AUX Pitch mode, or Phrase Trainer mode.

When you enter this mode, the Rhythm Pattern selection screen will appear, the selected rhythm will start, and the Rhythm & Bass mode icon will light. The indication of the value graph will change according to the pattern or tempo.

This mode contains the following four parameters. Use / to select parameters, and use the Value dial and the ENTER/REC button to set the value of each parameter.

If you select "CHAIN" as the rhythm pattern, there will be more chain pattern settings. (Refer to p.18, "Chain pattern settings")

If you select "JAM" as the recording mode in Phrase Trainer mode, the rhythm will sound with the pattern and tempo that you specify here.

The settings you select here are remembered even when the power is turned off.

1.Rhythm Pattern

Use the Value dial to select the rhythm pattern (p.40)

2.Tempo

Set the tempo in the range of 40-208 bpm.

You can also set the tempo by pressing the TAP button twice at the desired rhythm.

For a 6/8 time signature, the tempo can be set in a range of = 40 - 208

3.Bass On/Off & Bass Key

Here you can switch the bass on/off, and specify the key in which the bass will play.

If you press the ENTER/REC button in this screen, the bass will play in time with the rhythm. Depending on the rhythm pattern that you have selected, some bass lines will include a chord progression.

When the bass note is on, you can use the Value dial to set the key in a range of C, C#.A, B, allowing you to practice your guitar in a scale that matches that key.

If "METRONM" (metronome) is selected as the rhythm pattern, there will be no bass notes, and this screen will not appear.
When using Chain Patterns, the Bass Key setting will be ignored.

4. Rhythm & Bass Reverb Level

Use the Value dial to set the amount of Rhythm & Bass sound that will be sent to reverb modeling.

The same effect as for the guitar is used for reverb. This parameter has no effect if you have selected a program that does not use reverb modeling, or if the reverb effect level is "0."

Chain Pattern settings

These parameters are added only if you select "CHAIN" as the rhythm pattern. Press the ENTER/REC button to access the Chain Parameter Select screen. Use the buttons to select the location (1...8) for which you want to change the pattern, and use the Value dial to select the pattern (p.40) that will be used at that location. Use the buttons to specify the bass key of the selected pattern.

Up to 8 patterns can be connected. If you want to create a chain of 7 or fewer patterns, select "PTN END" for the last pattern.

Press the ENTER/REC button to exit the Chain Pattern Select screen.

Phrase Trainer mode

An audio source from the AUX jack or a phrase you play on your guitar can be recorded, and played back repeatedly as a loop.

This provides a convenient way to practice by playing along with the repeating phrase.

You can slow down the playback speed without affecting the pitch, which can help you to learn difficult phrases.

If you select "JAM" as the recording mode, the rhythm you specified in Rhythm & Bass mode will be recorded simultaneously with the guitar input, and looped.

1. Select the recording mode

In Play mode (except during bypass/mute or key lock), Rhythm & Bass mode, or AUX Pitch mode, press the PHRASE TRAINER button to enter Phrase Trainer mode.

When you enter this mode, the recording mode and time select screen will appear, and the Phrase Trainer icon will blink. In this screen, the PX4 will be ready to record.

The recording mode will cycle through the following choices each time you press the PHRASE TRAINER button.

AUX Records only the AUX input

GUITAR Records only the guitar sound

AUX+GTR Records both the AUX input and guitar

JAM Records the guitar together with the rhythm that was last selected in Rhythm & Bass mode

Use the value dial to select the recording time (for "JAM," the number of measures).

8 Approximately 7.9 seconds

16 Approximately 15.8 seconds

32 Approximately 31.7 seconds

1, 2, 4, 8 Number of measures

If the recording mode is "JAM," the recording quality will be set automatically, based on the tempo and the specified number of measures.

If you select a long recording time (16 or 32), the audio quality of the recording will be lower.

If the tempo of the rhythm is extremely slow, it will not be possible to record a large number of measures. Please re-specify the tempo in Rhythm & Bass mode (maximum length is approximately 31.7 seconds)

Start playback on your CD or other audio source, and at the point where you wish to begin recording, press the ENTER/REC button. Recording will begin.

If the recording mode is "JAM," recording will begin after two measures of playback.

If, after recording, you want to change the recording mode or recording time, press the PHRASE TRAINER button while playback is paused.

The recorded content will be lost when the power is turned off.

2.Recording

When you begin recording, the recording time will be indicated as a numerical value and by a value graph.

When you want to stop recording, press the EN-TER/REC button or the [▶II]. Recording will stop, and loop playback will begin automatically. If you do not stop recording, recording will continue until the selected recording time has elapsed, and loop playback will begin automatically.

If the recording mode is "JAM," recording will end automatically at the specified number of measures, and will switch to loop playback.

The phrase will be recorded and played back in mono.

3.Playback

The recording phrase will playback as a loop. During playback or while paused, you can use the / buttons to select programs.

Rotating the Value dial toward the left will slow down the playback speed without affecting the pitch.

You can choose from six levels of playback speed: 100% , 90% , 80% , 75% , 66% , and 50% .

During playback, you can press the [▶] button to rewind.

By pressing the PHRASE TRAINER button, you can hold the sound that was being played at the moment you pressed the button (the Hold function). This is convenient when you need to hear individual notes in a phrase.

4.Pause

When you press the [▶][] button, the playback will pause. Press the [▶][] button once again, and playback will resume.

Pressing the [ ] button while playback is paused will return you to the beginning of the recorded phrase.

If you wish to re-record

To re-record the phrase, press the [▶II] button to pause the playback.

Start the CD or other audio source, and press the ENTER/REC button at the beginning of the desired phrase.

If you want to change the recording mode or time, press the PHRASE TRAINER button while paused.

AUX Pitch mode

In this mode you can transpose the pitch of a CD or other audio source connected to the AUX jack. Press the AUX PITCH button to enter AUX Pitch mode. When you are in this mode, the AUX Pitch icon will light.

Use the Value dial to specify the amount of key transposition. The key can be transposed in a range of +/-1 octave.

The value can be adjusted upward and downward for 3 semitones in 10 cent steps, and in semitone steps (100 cents) for the remainder of the range.

The output will be mono in AUX Pitch mode.

The AUX Pitch setting is remembered even when the power is turned off.

Edit mode

In this mode you can turn each effect on/off, and edit the effect type, parameter values, and program name.

In Play mode, press the (or ) button to access the DYNA effect edit screen, entering Edit mode.

In any screen of Edit mode, you can use the control knobs to edit Amp modeling, or use the TAP button to set the delay time of Delay modeling.

Press the EXIT button to return

to Play mode.

If a program was not written after it was edited, the decimal point of the program number will light.

The edited settings will return to the settings of the original program if you switch programs or turn off the power without Writing (see p.26).

1. Select the effect that you wish to edit

Each time you press an buttons, you will cycle through the effects in the order shown below. When an effect is selected, its icon will blink.

2.Editing each effect

For each effect, you can select the effect type and set its parameter values.

Effects that are turned "OFF" will automatically be turned on if you press the ENTER/REC button or use the / buttons to select the effect type.

For details on the effect types and parameters, refer to Effect Parameters (p.29). Renaming the program, infrared transmitter settings, and writing the program are also performed here.

1) DYNA (Dynamics & Pick up Modeling) These are dynamics-type effects such as compressor and auto-wah that modify the tone, and pickup modeling effects.

2) AMP (Amp Modeling)

This models a guitar amp (15 different types).

*Operation will be different if SYNTH is selected as the type.

The amp type selected by the amp modeling selector can be selected and edited even without entering Edit mode.

The VOLUME control knob can be used to adjust the VOLUME even when the amp modeling effect is "OFF."

3) CAB (Cabinet Modeling)

This simulates the acoustical characteristics of the guitar amp's cabinet.

This is especially effective when you are not using an amp (e.g., when using headphones, or when connecting to a mixer, hard-disk recorder, or audio device).

4) MOD (Modulation & Filter Effect Modeling) These are modulation and filter-type effects such as chorus, flanger, phaser, and pitch shifter.

5) DLY (Delay Modeling)

These are spatial-type effects for which you can set the delay time by the interval at which you press the TAP button.

6) REV (Reverb Modeling)

These are spatial-type effects that add spaciousness to the sound.

7) NR (noise reduction)

Use the Value dial to adjust the depth of the noise reduction that is applied.

Increasing this value will produce more noise reduction. Normally you will adjust this so that you do not hear obtrusive noise when the strings are lightly muted.

If the NR value is raised excessively, the sound may be cut off prematurely, depending on the device that is connected. If this occurs, reduce the value.

Adjust the NR level as suitable for your guitar or pickup.

8) RENAME

Here you can specify a name for each program. The following characters can be used: space, 0-9, A-Z, " , , , - , / .

9) TX (Infrared transmitter)

Use the ENTER/REC button to turn the infrared transmitter on/off.

Infrared transmitter icon

The infrared transmitter setting is common to all programs, and is remembered even when the power is turned off.

Use the infrared transmitter within a visually unobstructed range of 4 meters or less.

If the infrared transmitter is left on, the battery life will be shorter. If you are not using the infrared transmitter, you should turn it off.

10)WRITE

Here you can write (store) a program that you created.

Use the Value dial to select the writing destina

tion (User programs only). When you do so, the name of the program that currently occupies the writing destination will be displayed briefly.

If you decide not to write, press the (or ) button to select a different screen.

When you press the ENTER/REC button, the edited program will be written into memory.

When the program has been written, the LCD will indicate "COMPLT" for approximately one second.

Write

Select a user program number as the writing destination

Program number that currently occupies the writing destination

Before writing an edited program into a different program number, be sure that you do not mind overwriting the data that is currently in that program number. The program data that is overwritten will be lost.

It is not possible to write to a preset program.

3.Reloading the factory programs

While holding down the RHYTHM button and the button, turn on the power. The LCD will ask "RELOAD?"

If you press the ENTER/REC button, the factory-set programs will be re-loaded into the user program area. The display will indicate "RELOAD", "VERIFY", "COMPLT" for a short time, and then the power-on screen will appear.

Never turn off the power during the reload operation.

If you decide not to reload the factory programs, press the EXIT button. The factory programs will not be reloaded; the normal power-on screen will appear, and the PX4 will be in Play mode.

Be aware that if you reload the factory-set programs, the user programs and any settings that are remembered when the power is turned off (master level, infrared transmitter, etc.) will all be rewritten.

Troubleshooting

If the PX4 does not operate as you expect, please check the following points first. If this does not resolve the problem, contact your dealer.

1.Power does not turn on.

• Are batteries installed? Alternatively, is the correct AC adapter connected to an AC outlet?

2.No sound

• Are your guitar, amp and headphones connected to the correct jacks?
• Is your amp turned on and set correctly?
• Are any cables broken?
  Is the master level of the PX4 set to "0" or to a low level?
• The VOLUME control knob may have been turned down.
  Is the PX4 muted?

Be aware that if all effects are off, the chain display will disappear, and it will not be possible to distinguish Bypass or Mute from the LCD display.

• Is the volume of your guitar turned down?

3.When using the infrared transmitter, there is no sound or the sound is distorted.

Is the infrared transmitter turned on?
- Are the PX4 and the headphones within a visually unobstructed range of 4 meters or less?
- The PX4's transmitter may be obstructed.
- Is the power of your infrared wireless headphones turned on?

In some cases, the output sound may be distorted because of the settings of the program. (Adjust the master level and/or program level.)

4.The volume from the device connected to the AUX jack is too loud or too soft, or cannot be heard.

• Adjust the output level of the connected device.

Make connections to the headphone jack of the device, instead of to its line output.

• Are you in Phrase Trainer mode? Exit Phrase Trainer mode.

• Are you using a connection cable with a built-in resistor?

5.Effects do not apply

• Is the PX4 bypassed? (the effect chain will be blinking)
• Are the effects used in the program turned on?

6.Tuner does not work.

• Is the PX4 bypassed or muted?

Effect Parameter

DYNA (Dynamics & Pickup modeling)

TYPE (▲/▼ button)		VALUE (Value Dial)
COMP	This compressor produces consistent levels and sustain.	Adjusts sensitivity.(1.0...10.0)
DynaEXC	This effect dynamically applies an exciter according to your picking strength. (This is especially effective when you want to give more sparkle to clean sounds.)	Adjusts sensitivity. (0...10.0)
VOX WAH	Models a VOX V847 wah pedal	Adjusts location of a pedal (1.0...10.0)
WAHUP1	Positive-polarity auto-wah that responds sensitively to attacks	Adjusts sensitivity. (0...10.0)
WAHUP2	Positive-polarity auto-wah that responds smoothly to attacks
WAHDWN1	Negative-polarity auto-wah that responds sensitively to attacks
WAHDWN2	Negative-polarity auto-wah that responds smoothly to attacks
SLOWATK	Smoothes the attack of a guitar to create a violin-like effect.	Specify the attack speed (1.0...10.0)
OCTAVE	This generates a pitch one octave lower than the original sound, and mixes it with the original sound to add a sense of depth and low end. This effect may not operate correctly if two or more strings are played simultaneously, or when low-pitched strings are played.	Adjusts effect level. (0...10.0)
RING	An effect that produces bell-like sounds. (For the cleanest effect, use the neck pickup, turn down the tone control of your guitar, and play near the 12th fret.)	Specify the frequency (1.0...10.0)
RINGUP	A ring modulator in which the effect changes dynamically depending on your picking strength.	Adjusts sensitivity. (0...10.0)
RINGDWN
AC SIM	This is an effect model that converts the sound of an electric guitar to that of an acoustic guitar.	Adjusts tone (0...10.0)
HUM>SGL	Pickup modeling that transforms the sound of a humbucking pickup into the sound of a single-coil pickup.
SGL>HUM	Pickup modeling that transforms the sound of a single-coil pickup into the sound of a humbucking pickup.
HF TONE	Pickup modeling that simulates the "half-tone" position between two pickups.
PHASOUT	Pickup modeling that simulates the "out of phase" sound when two pickups are connected out of phase.

AMP (Amp Modeling)

When using Amp Modeling, the control knobs (GAIN, TREBLE, BASS, VOLUME) and Value dial will both be active. The VOLUME knob can still be used even when Amp Modeling is "OFF."

If SYNTH is selected as the type, the control knobs will control oscillator selection, VCF setting, direct level, and synth level respectively.

Types marked by an asterisk* can also be selected by the amp modeling selector.

In order to take full advantage of the characteristics of Amp Modeling, we recommend that you use it in conjunction with Cabinet Modeling when listening through headphones or when recording from line output.

TYPE (▲/▼ button or Amp modeling selector)		VALUE (Value Dial & Control Knobs)
BTQ CLN*	Clean channel of a high-end 100 W hand made amp. (recommended CAB: 4x12CLS, 4x12VIN, 4x12MDN)	GAIN -- amount of distortion TREBLE ---- high range BASS ---- low range VOLUME ---- output volume Value dial ---- mid range (0...10.0)
BLK2X12*	2x12 combo amp indispensable for country or blues players. (recommended CAB: 2x12BLK)
TWD1X12*	Combo amp covered in tweed cloth. (recommended CAB: 1x12TWD)
TWD4X10*	4x10 combo amp designed for bass guitar. (recommended CAB: 4x10TWD)
AC15*	VOX AC15 manufactured in 1962. (recommended CAB: 1x12VOX)
AC30TB*	Brilliant channel of a VOX AC30TB. (recommended CAB: 2x12VOX)
UKBLUES*	UK-manufactured vintage stack amp head. (recommended CAB: 4x12CLS)	GAIN — amount of distortion TREBLE —— high range BASS —— low range VOLUME —— output volume Value dial —— mid range (0...10.0)
UK '80S*	UK-manufactured 1983 model 100W head with master volume. (recommended CAB: 4x12CLS, 4x12VIN, 4x12MDN)
UK MDN*	UK-manufactured 100 W modern amp. (recommended CAB: 4x12VIN, 4x12MDN)
RECTO*	High-gain amp with eye-catching metal plate. (recommended CAB: 4x12VIN, 4x12MDN)
FUZZ*	Vintage fuzz.
AC30	VOX AC30 modeling. (recommended CAB: 2x12VOX)
BTQ OD	Overdrive channel of a high-end 100 W hand-made amp. (recommended CAB: 4x12CLS, 4x12VIN, 4x12MDN)
UK '70S	High treble channel of a UK-manufactured 1969 model 100 W amp head. (recommended CAB: 4x12CLS)
US HI-G	1991 model 100 W amp head covered in snake skin. (recommended CAB: 4x12VIN, 4x12MDN)
SYNTH	Chromatic guitar synth modeling.	Refer to separate Guitar Synth table

Guitar Synth parameters

Oscillator selection: 0...15 (GAIN knob)	0: Sawtooth wave 2 octaves down	1: Sawtooth wave 1 octave down
	2: Sine wave 1 octave down	3: Sawtooth wave
	4: Sine wave	5: Sawtooth wave 1 octave up
	6: Sine wave 1 octave up	7: Sine wave 2 octaves up
	Oscillators 8...15 are oscillators 0...7 with portamento turned on.
VCF setting: 0...10.0 (TREBLE knob)	Voltage Controlled Filter sensitivity adjustment
	0...4.7 is sensitivity adjustment in the positive (+) direction,and 5.0...10.0
	is sensitivity adjustment in the negative (-) direction.
	Set this to 5.0 for a sine wave oscillator.
Direct level: 0...10.0 (BASS knob)	Adjusts the volume of the guitar.
Synth level: 0...10.0 (VOLUME knob)	Adjusts the volume of the synth.
Threshold adjustment: 1.0...10.0 (Value dial)	Adjusts the sensitivity of the synth in response to the volume of the guitar
	Adjust this as appropriate for your guitar or pickup.

The Guitar Synth is effective only when single notes are played. The desired effect will not be obtained if chords are played.

If your instrument is not tuned correctly, the results may not be as you expect. In this case, re-tune your instrument.

CAB (Cabinet modeling)

TYPE(▲/▼ button)		VALUE (Value Dial)
1X8TWD	This model simulates an open back cabinet with one 8-inch speaker.	PRESENCE: Adjusts tone of the high-frequency range. (0...10.0)
1X12TWD	This model simulates an open back cabinet with one 12-inch speaker typically used for blues.
1X12BLK	This model simulates an American open back cabinet with one 12-inch speaker and a bright tonal character.
1X12VOX	This model simulates a Vox open back cabinet with one 12-inch "Blue" speaker.
2X12BLK	This model simulates an American open back cabinet with two 12-inch speakers.
2X12VOX	This model simulates a Vox open back cabinet with two 12-inch "Blue" speakers.
2X12DC	This model simulates a modern open back cabinet with two 12-inch speakers.
4X10TWD	This simulates an open back cabinet with four 10-inch speakers.
4X12CLS	This simulates a closed back cabinet with four 25W 12-inch speakers.
4X12VIN	This simulates a closed back cabinet with four 30W 12-inch speakers.
4X12MDN	This simulates a closed back cabinet with four 75W 12-inch speakers.

MOD (Modulation & Filter Effect Modeling)

TYPE (▲/▼ button)		VALUE (Value Dial)
CHORUS1	Vintage chorus in which the effect sound is output to the left and the direct sound to the right	Adjusts modulation speed (0.1...10.0 [Hz])
CHORUS2	Vintage stereo chorus that inverts the phase of the effect sound between left and right, creating more spaciousness.
FLANG 1, 2, 3	Vintage flanger with a distinctive sound (1, 2, 3 have feedback amounts of 0%, 22%, and 60% respectively)
FLANG4	Vintage flanger that inverts the phase of the feedback
PHASER1	A popular four-stage vintage phaser
PHASER2	A four-stage vintage phaser with a thick mid-range
PHASER3	A ten-stage vintage phaser with a mild effect
U-VIBE1	Simulation of a pedal vibe set to chorus mode	Adjusts modulation speed (1.0...10.0 [Hz])
U-VIBE2	Simulation of a pedal vibe set to vibrato mode
TREM1	Smooth tremolo
TREM2	Tremolo built into a guitar amp
TREM3	Strong and deep tremolo
AT PAN1	Auto Pan (LFO:square wave□□)	Adjusts modulation speed (0.1...10.0 [Hz])
AT PAN2	Auto Pan (LFO:sine wave□□)
ROTARY1	Rotary speaker simulation	Adjusts modulation speed (1.0...10.0 [Hz])
ROTARY2, 3	Rotary speaker simulation in which your playing dynamics switch rotor speeds. 2 switches from slow to fast when you play strongly. 3 switches from slow to fast when you play softly.	Specify the level at which the speed is switched (1..0...10.0)
PITCH1, 2, 3	Pitch shifter (PITCH1, 2, 3 differ in the level of effect sound)	Amount of pitch shift (-24, -17, -12... -1, -d, d, 1...12, 19, 24) (d = detune)
MAJ3UP	Intelligent pitch shifter; a 3rd up in a major key	Specify the key (C, C#...A#, B)
MAJ3DWN	Intelligent pitch shifter; a 3rd down in a major key
MIN3UP	Intelligent pitch shifter; a 3rd up in a minor key
MIN3DWN	Intelligent pitch shifter; a 3rd down in a minor key
PER4TH	Intelligent pitch shifter; a 4th up in a major key
PER5TH	Intelligent pitch shifter; a 5th up in a major key
MAJ6TH	Intelligent pitch shifter; a 6th up in a major key
FEEDBK1, 2	An effect that artificially generates feedback, and operates when a note is held for an extended time. 2 generates feedback one octave higher	Adjusts effect level (0...4.7) Adjusts vibrato depth (5.0...10.0)
FEEDBK3, 4	An effect that artificially generates feedback, and operates constantly when sustained. 4 generates feedback one octave higher
FILTER	Low pass filter	Adjusts frequency (1.0...10.0 [Hz])
FILTUP	Positive-polarity low-pass filter type auto-wah	Adjusts sensitivity (0...10.0)
FILTDWN	Negative-polarity low-pass filter type auto-wah
TALK 1, 2, 3, 4	An effect that simulates a "talking guitar" 1:YAH-YAH, 2:U-WAH, 3:YOI-YOI, 4:YEAH	Adjusts sensitivity (0.0...10.0)
RANDOM 1, 2, 3, 4	Random step filter that moves a filter randomly 1, 2, 3, and 4 change the frequency band affected by the filter	Adjusts modulation speed (1.0...10.0 [Hz])

About the Intelligent Pitch Shifter

The Intelligent Pitch Shifter creates musically useful harmonies by varying the amount of pitch shift according to the note you play and the key in which you are playing. For example if you select a pitch shift of a 3rd upward in a major key (MAJ3UP), the amount of pitch shift will vary automatically between three semitones (a minor third) and four semitones (a major third).

- When MAJ3UP is used with a key setting of C

The pitch created by the intelligent pitch shifter is shown in parenthesis ( ).

The PX4 provides seven types of intelligent pitch shifting, with intervals of a 3rd, 4th, 5th, and 6th. (For the 3rd, you can select either the upper or lower part, and a major or minor key.)

If your instrument is not tuned correctly, the results may not be as you expect. In this case, re-tune your instrument.

The intelligent pitch shifter will function when you play individual notes. It cannot produce the effect for chords.

DLY (Delay Modeling)

For each type, 1, 2, 3, 4 and 5 have different amounts of feedback.

The delay time is set by the interval at which you press the TAP button twice. The specified delay time can be a maximum of 500 ms for SLAP or a maximum of 2 sec for MULTI, and can be checked by holding down the TAP button

TYPE (▲/▼ button)		VALUE (Value Dial)
SLAP1, 2, 3, 4, 5	Slap-type delay whose delay time is 1/4 of the interval at which you press TAP	Adjusts effect level. (0...10.0)
DELAY1, 2, 3, 4, 5	Stereo delay
PPDLY1, 2, 3, 4, 5	Dual-tapped ping-pong delay that pans the sound to left and right
ECHO, 2, 3, 4, 5	Tape echo simulation with a warm tone
MULTI1, 2, 3, 4, 5	Dual-head tape echo simulation with special stereo design (creates a spacious reverberation)

REV (Reverb Modeling)

TYPE (▲/▼ button)		VALUE (Value Dial)
DRYAIR	Reverb that produces a sensation of dry air	Adjusts effect level. (0...10.0)
WETAIR	Reverb that produces a sensation of wet air
ROOM1	Bright-sounding room reverb
ROOM2	Mellow-sounding room reverb
PLATE1	Tight-sounding plate reverb
PLATE2	Bright-sounding plate reverb
HALL1	Reverberation of a mid-sized hall	Adjusts effect level. (0...10.0)
HALL2	Reverberation of a large hall
SPRING1	Spring reverb of a guitar amp
SPRING2	Dense spring reverb

Preset Program Name

No.	Name	No.	Name	No.	Name	No.	Name	No.	Name
1	WILD	11	PINK	21	50TWEED	31	ROTARY	41	OCTAVE
2	MORE	12	PAPA	22	HUMBLE	32	CHORUS	42	RINGER
3	MAY	13	ANGUS	23	TEXAS	33	COMP CL	43	C MAJOR
4	STEVIE	14	JIMI69	24	POP	34	FLANGE	44	E MINOR
5	BLINK	15	MR SKY	25	JAZZY	35	SLOWPAN	45	ACOUSTC
6	PASS	16	E-L-P	26	ROCK	36	SOLOPAN	46	PIEZO
7	CREEM	17	BASSYNT	27	BLUES	37	FEEDBK	47	SYNTH
8	BEETLE	18	UK'80	28	BUBBLES	38	TALK	48	ORGAN
9	MELISSA	19	RECTIFY	29	WHOTRON	39	BOW	49	LOWBASS
10	PURPLE	20	US HI-G	30	VOXWAH	40	SOLOATK	50	FLUTE

Rhythm Pattern List
m: Number of measures when used in a pattern chain

No.	Name	m	No.	Name	m	No.	Name	m	No.	Name	m
1	METRONM	1	11	16 BEAT 4	2	21	ROCK3	1	31	* MOTOWN2	2
2	8 BEAT 1	1	12	16 SHFL	1	22	THRASH	1	32	SURF1	1
3	8 BEAT 2	1	13	3/4	2	23	R' N' B	1	33	* SURF2	1
4	8 BEAT 3	2	14	3/4 SHFL	2	24	* BLUES	1	34	REGGAE 1	2
5	8 BEAT 4	1	15	* 6/8 1	4	25	COUNTRY	1	35	* REGGAE 2	1
6	* 8 BEAT 5	2	16	* 6/8 2	4	26	* JAZZ 1	2	36	DANCE 1	2
7	8 SHFL	1	17	* POP1	2	27	* JAZZ 2	2	37	DANCE 2	2
8	16 BEAT 1	2	18	* POP2	1	28	FUNK1	2	38	* EURO	1
9	16 BEAT 2	2	19	ROCK1	1	29	FUNK 2	2	39	BOSSA	2
10	16 BEAT 3	1	20	ROCK2	2	30	* MOTOWN1	1	40	SAMBA	1

• The bass line of these rhythm patterns follow the chord progressions (Bass Key = E) shown below.

6	BEAT5	Em-A	30	MOTOWN1	E7-A
15	6/8 1	E-C#m-A-B	31	MOTOWN2	E-B
16	6/8 2	Em-G-A-C	33	SURF2	E-C#m-A-D
17	POP1	E Diatonic Descending	35	REGGAE1	Em
18	POP2	E-C#m-A-B	38	EURO	Em-D
24	BLUES	E-A-E-B-A-E-B
26	JAZZ1	E7 or Em7
27	JAZZ2	Em7-A7-Dm7-G7

Precautions

Emplacement

MOD (Modulation et modelage

REV (Reverb Modeling) 78

Listedesprogrammes

préselectionnes 79

CAB (Cabinet modeling)

REV(Reverb Modeling)

DYNA (Dynamics & Pickup modeling) 109

AMP (AMP Modeling) 111

CAB (Cabinet modeling) 114

MOD (Modulation& Filter Effect Modeling) 115

DLY (Delay Modeling) 118

REV (Reverb Modeling) 118

Parameterliste

Quick Edit (Schnellzugriff)

3. Bass On/Off & Bass-Tonart

1) DYNA (Dynamics & Pickup Modeling)

(Modulation & Filter Effect Modeling)

6) REV (Reverb Modeling)

DYNA (Dynamics & Pickup modeling)

CAB (Cabinet modeling)

MOD (Modulation&Filter Effect Modeling)

DLY (Delay Modeling)

REV (Reverb Modeling)

KORG Correction and Addition for Owner's Manual of PX4

Page 16, right column, 11th line

Error

This mode contains the following four parameters.

Correct

This mode contains the following five parameter.

Page 17, left column, upper figure

Additional parameter "Rhythm & Bass level."

• Page 18, left column, lower figure (LCD)

Error LEVEL, 10

Correct REVERB, 7.0

Page 23, left column, lower figure

Replace parameter order of "TX" and "RENAME."

Page 25, right column, 7th line

Error 8) RENAME Correct 9) RENAME

Page 26, left column, first line

Error 9) TX (Inf... Correct 8) TX (Inf...

• Page 26, before "Chain Pattern settings"

Additional Parameter explanation "Rhythm & Bass level."

5. Rhythm & Bass Level

Use the Value dial to set the level of Rhythm & Bass sound. The bass note will be affected only if Bass is turned on.

KORG

Correction REVERB, 7.0

Page 103, links, unless otherwise noted

5. Rhythm & Bass Level

1. Press in the direction of the arrow (a) until locking tab (C) clicks into place.

1. Press the strap holder locking tab (C) in the direction of arrow (b) to release the lock.

1. With the lock released, slide the PX4 in the opposite direction from when attaching it, and remove it from the holder.

This product has been manufactured according to strict specifications and voltage requirements that are applicable in the country in which it is intended that this product should be used. If you have purchased this product via the internet, through mail order, and/or via a telephone sale, you must verify that this product is intended to be used in the country in which you reside.

WARNING: Use of this product in any country other than that for which it is intended could be dangerous and could invalidate the manufacturer's or distributor's warranty. Please also retain your receipt as proof of purchase otherwise your product may be disqualified from the manufacturer's or distributor's warranty.

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