Korg PX4B Product information sheet

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EasyStart CONTENTS
Getting started 2
Guided Tour of PX4B modes:
Using the Tuner 2
Rhythm mode 3
Phrase Trainer mode 3
AUX Pitch / BASS Cancel mode 4
Write your own Program 4
EasyStart
• Personal Effects processor utilizing Korg’s
REMS Modeling System, which allows for
the most accurate and varied modeling,
including 10 of the world’s most coveted
bass guitar amps.
• 122 effects- 7 at a time (Dynamics, Amp,
Cabinet, Modulation, Delay, Reverb and
Noise Reduction.
• Four “real-time” knobs for easy editing.
• Preamp and Pickup modeling.
• Feedbacker effect with four modes.
• 100 Rhythm Patterns, plus you can Chain
up to 8 different Rhythm patterns together.
• Phrase Trainer with up to 32 seconds of
loop-able and pitch-adjustable recording
time, makes learning licks easy!
• Rhythms can be recorded with your Bass
guitar for even more practicing
possibilities.
• 16 Bass Guitar Synth effects.
• Infrared transmitter for optional wireless
headphones.
PX4B Main Features
PANDORA
PERSONAL MULTI EFFECT PROCESSOR
PX4B
A
mp model
control Knobs
Effect chain
status
Phrase Trainer
Rhythm
B
yp
ass/Tune
Exit button
Insert level switch
A
mp modeling
selector
Program select, Effect Edit buttons
Parameter
select
buttons
Value dial
Tap
Enter/
Rec
A
ux/
Pitch
Bass Middle Treble Volume

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Getting Started
The PX4B is a Personal Effects Processor that utilizes Korg’s REMS (Resonant structure and Electronic circuit
Modeling System) technology to model 10 of the most popular bass guitar amps, as well as giving you first-class
effects, all in a portable, compact unit. Features like Rhythm accompaniment, Phrase Trainer, Bass canceller and Key
Transpose make this a valuable practice tool for bass guitarists of all skills and levels.
Power Connections:
1. Remove the rear panel battery compartment cover by sliding it in the direction of the ◄.
2. Install the four AAA batteries (included) in the correct positions, and replace the cover.
Audio Connections:
1. Connect a bass guitar to the INPUT jack located on the bottom panel of the unit, with a ¼” shielded instrument cable.
2. Connect a pair of headphones to the OUTPUT jack. (Or connect a Stereo Y-cable to the OUTPUT jack to use this unit
with an external monitoring system or multitrack recorder).
Power up and play:
1. Move the right panel power switch to ON , or one additional “click” for power with the backlight option.
2. Raise the volume on your bass guitar, and on the PX4B, use the DIAL to increase the MASTER volume. After adjusting
the volume, you can scroll through the programs in the unit by using the ▲and ▼arrow buttons.
! When you use batteries instead of the optional 4.5 volt AC adaptor, switching the backlight off will increase battery life.
Guided Tour of PX4B Modes
Let’s tune!!!
1. Press the TUNE/BYPASS button.
2. Play a single open string and the display will indicate the name of the note, a meter to fine tune, and calibration (Default
is set to 440Hz). The note is in tune when the display “icon” is in the center of the meter.

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! When tuning, all effects will be bypassed.
! To tune silently (mute output jack), press and hold the TUNE/BYPASS button for two seconds.
! In any mode, pressing the EXIT button will return you to the first page of that mode.
Rhythm mode:
Rhythm mode will allow you to jam along with preset drum patterns and fills.
1. Press the Rhythm button to enter Rhythm mode. The display will indicate a “drum set icon”, and the name of the rhythm
pattern will be displayed. A “flashing tempo icon”, representing current tempo will also be indicated.
2. Use the DIAL to select the desired rhythm pattern.
3. Set the tempo: There are two methods of setting tempo:
a. Use the TAP button located on the front of the unit by tapping the button twice to the desired
tempo.
b. Access the tempo menu by pressing the ►arrow button once. Then use the DIAL to adjust the
tempo from 40 to 208 bpm.
4. Once the rhythm pattern and tempo have been set, use the ►arrow button to access the REVERB menu . Here you will
be able to adjust the amount of reverb on the rhythm pattern by using the DIAL. This will add an element of realism to the
rhythm pattern.
! This parameter has no affect if you have selected a program that does not use reverb, or if the level is “0”.
5. Use the ►arrow button once again to access the LEVEL menu. The DIAL will adjust the overall level of the rhythm
pattern being played.
Phrase Trainer mode:
This mode will assist you in learning complex parts by sampling music through the AUX input. In total, you can sample
in four modes, selected by repeatedly pressing the PHRASE TRAINER button:
• AUX input (CD, MiniDisk, DAT, etc.)
• BASS: You can sample your own playing through the BASSGUITAR input
• AUX and BASS: Sample a CD and your bass guitar together
• JAM: Sample your bass guitar with a selected pattern from the RHYTHM mode.
To use the Phrase Trainer:
1. Press the PHRASE TRAINER button until BASS is selected. Here you can select the desired amount of recording time
by using the DIAL. The choices are 8, 16, or 32 seconds.
2. To start recording press the ENTER/REC button. Once the specified length of time has passed the unit will automatically
loop the recorded segment.
3. To pause the playback press the ►arrow button and then once again to resume playback.

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4. To rewind a segment of the recording press the ◄arrow button.
5. To stop recording, press the ENTER/RECORD button at any point and it will automatically loop the recorded segment.
! The unit will only rewind as long as you hold down the button. Playback will start when you release the button.
Tip If you press and hold the PHRASE TRAINER button while the phrase is playing, you will activate the HOLD function, to
hold the sound that was being played at the moment you pressed the button.
AUX Pitch / BASS Cancel mode:
AUX Pitch mode is used to transpose and/or tune an external source (CD, MiniDisk™, DAT, etc.) to your bass guitar.
The key can be transposed in a range of +/- one octave. The value can be adjusted upward and downward for 3
semitones in 10-cent steps, and in semitone steps of 100 cents for the remainder of the range. You can also apply the
Bass cancel effect to eliminate the low-frequency range of the external source.
To AUX Pitch mode:
1. Make sure your external source is connected to the AUX jack, and is playing.
2. Press the AUX PITCH button.
3. Use the DIAL to select the desired key and fine-tune the pitch.
To BASS Cancel mode:
1. Press the AUX PITCH button to alternate between Key Transpose (KEY-TRN) ONLY and “Key Transpose + Bass cancel”
(KTR + BC).
2. You can turn on only the Bass cancel function by setting the Key Transpose setting to “0” and selecting Key Transpose + Bass
Cancel. (output will be in mono in AUX Pitch mode)
3. Press the EXIT button to return to play mode.
Write your own Program:
1. Select an amp model with the AMP SELECTOR . Then you can adjust BASS, MIDDLE, TREBLE,and VOLUME with
the real time adjustment knobs.
2. Use the ►arrow button to move through the different menu pages: Dynamics, Amp, Cabinet, Modulation, Delay,
Reverb, Noise Reduction, TX (Optional wireless headphones), Name and Write.
3. When one of the menu blocks flashes, use the ▲or ▼arrow buttons to choose an effect.
4. Once an effect is selected, use the DIAL to select the desired amount of each effect.
5. To name and write an edited effect: When the cursor is flashing under a letter of the name, use the DIAL to select a
different letter or character, and the▲and ▼arrow buttons to move the cursor position. After you complete your new
name, press the ►arrow button to go to write mode (*WRITE* will display) . Use the DIAL to select one of 50 user
locations to save your preset to, and then press ENTER/REC. You will see the word “COMPLT” to confirm that you have
saved your Program to the selected location.