Korg RHYTHM KR-55 Pro User manual

Owner’s Manual
Table of contents
Recorder mode ................................................. 20
Metronome function ......................................................................20
Count start function........................................................................20
Mark function ....................................................................................20
Loop recording/playback function............................................21
Exporting song data........................................................................21
Importing an audio le ..................................................................21
Player mode ...................................................... 22
Playlist function ................................................................................22
Loop/auto-consecutive playback function ............................22
Adjusting the playback speed.....................................................22
System mode..................................................... 23
Making system settings .................................................................23
Setting items......................................................................................23
Formatting an SD card [M8] “Init”...............................................23
SD card test function “tESt”...........................................................23
Appendix........................................................... 24
Voice name list ..................................................................................24
Data structure on the KR-55 Pro .................................................24
Using a foot switch ..........................................................................25
Troubleshooting...............................................................................25
Error messages..................................................................................26
Restoring the factory settings .....................................................26
Specications.....................................................................................27
KR-55 Pro Signal Path....................................... 28
Introduction........................................................ 2
Main features....................................................................................... 2
About the Owner’s Manual............................................................. 2
Parts and their functions ................................... 3
Top panel............................................................................................... 3
Rear panel............................................................................................. 6
Setup ................................................................... 7
Connections......................................................................................... 7
About SD cards ................................................................................... 7
Turning the power on/o................................................................ 8
Quick Start .......................................................... 9
Listening to the demo performances......................................... 9
Connecting and playing instruments.......................................10
Playing and recording rhythm styles (Rhythm mode)........11
Using the recorder function (Recorder mode) ......................13
Playing audio les and recording your performance
(Player mode)....................................................................................16
Rhythm mode ................................................... 18
Registering a rhythm variation and tempo to the [M1]–[M8]
buttons.................................................................................................18
Chain function...................................................................................18
Metronome function ......................................................................19
Count start function........................................................................19
Tonal character when the tempo/playback speed is
adjusted...............................................................................................19
E 2

KR-55 Pro Owner's Manual
2
* All product names and company names are the trademarks
or registered trademarks of their respective owners.
Introduction
Thank you for purchasing the KORG RHYTHM KR-55 Pro.
To help you get the most out of your new instrument, please
read this manual carefully.
Main features
Rhythm Player function
• You can enjoy jamming along with realistic live-recorded
drum and percussion accompaniment.
• Twenty-four dierent rhythm styles are built in. You can
directly select these rhythm styles by using the buons on
the top panel.
• Each rhythm style has two variations, and each of these
variations contains three rhythm paerns: basic, ll-in 1,
and ll-in 2. You can switch variations or rhythm paerns
in real time as needed during your performance.
• You can use the chain function to create the rhythm
structure of an entire song so that it will play automatically.
Acoustage (surround) function
• Acoustage technology provides an expansive, extra-wide
sound eld.
* Acoustage (Virtual Surround Technology by KORG)
is Korg’s original and revolutionary virtual sound
technology for creating a unique personal acoustic space.
This technology oers an unprecedented and unique
three-dimensional acoustic experience, when connecting
stereo speakers to the OUTPUT L/MONO and R jacks.
The playback system itself is acoustically analyzed, and
optimizations are applied for that specic system so that its
full potential can be realized.
Full-edged mixer functionality
• A mic input, two guitar inputs, and an AUX input allow
multi-channel mixing.
• You can apply a reverb eect to the inputs from the MIC IN
jack, INPUT 1 jack, and INPUT 2 jack.
• You can use an equalizer to adjust the tonal character.
Tuner function
• You can tune while viewing a large and easily visible meter.
• You can tune while listening to the pitch of an audible
guide tone.
Recording function *1
• You can create complete songs by recording chained
rhythm styles along with your own performance.
• You can record along with the playback of an audio le
from an SD card.
• The completed song data can be exported (wrien) as a
standard audio le, and played back by a commercially
available audio player or loaded into your computer DAW.
Player function *1
• Standard audio les (WAV) can be played back from an SD
card.
• You can use the playlist function to play back your audio
les in a specic order. A playlist you create can be used for
background music or live performances.
• You can change the playback speed of audio les.
Foot switch control
• By using a VOX VFS5 foot switch, you can perform
operational tasks without having to take your hands o of
your instrument. This includes operations such as rhythm
playback or beginning recording/playback while you play
your instrument.
*1: You’ll need to insert an SD card into the KR-55 Pro.
About the Owner’s Manual
The KR-55 Pro Owner’s Manual is organized as follows:
• KR-55 Pro Quick Start Guide (printed material)
• KR-55 Pro Owner’s Manual (PDF: this booklet)
Download the PDF from the following website.
hp://www.korg.com
Tip: We recommend that you read this manual while
referring to the STAGEMAN 80 video manual. You can view
this manual on the Korg website.
hp://www.korg.com
Regarding data
Unexpected malfunctions caused by inappropriate operation can
cause the contents of memory to be lost. Please save important
data to other media for safekeeping. KORG INC. accepts no
responsibility for any damages resulting from loss of data.
COPYRIGHT WARNING
This professional device is intended only for use with works
for which you yourself own the copyright, for which you have
received permission from the copyright holder to publicly
perform, record, broadcast, sell, and duplicate, or in connection
with activities which constitute “fair use” under copyright law.
If you are not the copyright holder, have not received permission
from the copyright holder, or have not engaged in fair use of the
works, you may be violating copyright law, and may be liable for
damages and penalties. If you are unsure about your rights to a
work, please consult a copyright aorney.
KORG TAKES NO RESPONSIBILITY FOR ANY INFRINGEMENT
COMMITTED THROUGH USE OF KORG PRODUCTS.

Parts and their functions
3
Parts and their functions
Top panel
1. Mixer section
MIC IN jack (XLR jack)
Connect a dynamic mic here.
Condenser mics are incompatible with the KR-55 Pro.
INPUT 1 jack, INPUT 2 jack
Connect a guitar, bass, or other instrument to these jacks.
TUNER button
Turns the tuner function on.
ACOUSTAGE button
Switches the Acoustage (wide) function on/o.
The Acoustage function cannot be used while recording.
Turn the Acoustage (wide) function o when using
headphones. The Acoustage function is optimal when
connecting stereo speakers to the OUTPUT L/MONO and
R jacks.
Power button
Turns the power on.
See page 8 “Turning the power on/o”
2: HOT
1: GND
3: C
OLD
Note: The power buon blinks rapidly if the baeries become
low while the KR-55 Pro is running on baeries.
The KR-55 Pro has an auto power-o function. The auto
power-o function automatically turns o the power when
there has been no user input for a certain length of time (which
you can specify). If the auto power-o function has turned the
power o, simply turn it back on again.
Tip: You can specify the time after which the auto power-o
turns the power o (see page 23 “[M3] Auto power-o
function “APOF””).
MIC knob, peak LED
This knob adjusts the input level from the mic that’s connected
to the MIC IN jack. To avoid signal clipping (signal that’s
too loud) this knob should be adjusted so that the peak LED
doesn’t light up when signal is being input at a high volume
level.
(INPUT) 1 knob, (INPUT) 2 knob, peak
LED
These knobs adjust the input level from the instruments that
are connected to INPUTS 1&2. To avoid signal clipping (signal
that’s too loud) each knob should be adjusted so that the peak
LED doesn’t light up when signal is being loudly input.
The peak LED is shared by INPUT 1 and INPUT 2. If you’re
using both input jacks, adjust the knobs for both INPUT 1 &
INPUT 2.
1. Mixer section
2. Select section
3. Control section
3-a: Mode buttons
3-b: Function buttons 3-c: Control buttons, VALUE dial,
Display

KR-55 Pro Owner's Manual
4
RHYTHM/PLAY knob
• Rhythm mode: This knob adjusts the volume of the rhythm
style or metronome.
• Recorder mode, Player mode: This knob adjusts the
playback volume of the recorder or player.
Note: Turning the knob all the way to the right produces
unity gain.
REVERB knob
This knob adjusts the send level to the reverb eect.
You can apply reverb to the signals from the MIC IN jack,
INPUT 1 jack, and INPUT 2 jack.
By default, reverb is applied to the following inputs: MIC
IN jack, INPUT 1 jack, and INPUT 2 jack. If you want, you
can apply the reverb only to the MIC IN jack, or only to
the INPUT 1 and INPUT 2 jack (see page 23 “[M2] Eect
operation “EFF””).
BASS knob
This knob adjusts the tone of the low-frequency range.
TREBLE knob
This knob adjusts the tone of the high-frequency range.
VOLUME knob
This knob adjusts the overall volume.
2. Select section
The functions of these buons will change depending on the
mode that’s selected.
– buttons
• Rhythm mode: select the rhythm style or metronome
sound. If the chain function is on, these buons indicate the
rhythm style that is played.
• Recorder mode: select the metronome sound that is heard
when the metronome is on.
• Player mode: select the audio le to play back.
• Tuner function: indicate the pitch. See page 10 “Using
the tuner function”.
– buttons
• Rhythm mode: These buons blink to indicate the playback
position of the currently selected rhythm style. When
the chain function is on, you’ll use these buons to check
the location where the rhythm style is registered. You
can also use these to register a favorite rhythm variation
and performance tempo, and recall it instantly (memory
function).
• Recorder mode: Registers the position of the song data (see
page 20 “Mark function”).
• Player mode: Use these buons to select a folder inside the
inserted SD card.
(see page 24 “Folder and le structure”).
• System mode: Select system seing items
• Tuner function: Sound a guide tone (see page 10 “Using
the tuner function”)
3. Control section
3-a: Mode buttons
button
Selects Rhythm mode. In Rhythm mode you can play back
24 dierent rhythm styles. You can also record your own
performance along with the chained rhythm styles.
See page 11 “Playing and recording rhythm styles (Rhythm
mode)”
See page 18 “Rhythm mode”
button
Selects Recorder mode. In Recorder mode you can make a
new recording, overdub onto an existing recording, or use
loop recording.
See page 20 “Recorder mode”
button
Selects Player mode. In Player mode, you can play audio les
from the SD card. You can also record your own performance
along with the audio le playback.
See page 16 "Playing audio files and recording your
performance (Player mode)"
See page 22 “Player mode”
button
Selects System mode. In System mode you can check the
status of the system and adjust seings for the overall system.
See page 23 “System mode”
Tip: If you press the [SYSTEM] buon and the [Count Start]
buon simultaneously, you enter Demo mode (see page 9
“Listening to the demo performances”).
3-b: Function buttons
button
• Rhythm mode: Turns the chain function on/o (see page
18 “Chain function”).
• Player mode: Turns the playlist function on/o (see page
22 “Playlist function”).
button
• Recorder mode, Player mode: Turns the metronome
function start/stop.
To change the time signature of the metronome, hold down
the [Metronome] buon and turn the VALUE dial.
See page 19 “Metronome function”

Parts and their functions
5
button
• Recorder mode: Switches the loop function on/o. When
the loop function is on, the region specied by the Mark
function can be played as a loop, or recorded. (see page
20 “Mark function”, page 21 “Loop recording/playback
function” ).
• Player mode: Turns the loop/auto-consecutive playback
function on/o. If the loop/auto-consecutive playback
function is on, you can play one le or all les as a loop
or consecutively. (see page 22 “Loop/auto-consecutive
playback function”).
Tip: You can choose from several types of functions when
the loop/auto-consecutive playback function is on.
button
• Rhythm mode, Recorder mode: Turns the count start
function on/o. If this is on, playback or recording will
start after a two-measure count. Use the VALUE dial to
specify the tempo of the count (see page 19 “Count start
function”).
Note: If you’re overdubbing, you need to select the tempo that
matches your song.
Tip: In Rhythm mode, use the RHYTHM/PLAY knob to adjust
the volume of the count. In Recorder mode the volume is
xed, and cannot be controlled by the RHYTHM/PLAY knob.
Tip: If you want the count to be other than a 4/4 time
signature, change the time signature (see page 19 “Count
start function”).
button
When you insert an SD card, the buon is lit. When you
press the buon, the display shows the remaining available
recording time. In System mode, this buon accesses the SD
Card Test function. (see page 23 “SD card test function
“tESt””)
button
• Recorder mode: After recording in Recorder mode, this
buon reverts to the state prior to recording (buon lit
up). Press the buon once again to return to the state after
recording (buon unlit).
button
• Rhythm mode: If the Chain function is on, this buon
deletes all rhythm styles that are assigned to the currently
selected chain.
• Recorder mode: Deletes the currently selected song
• Player mode: Deletes the currently selected audio le
Press the [Delete] buon until it lights, and then press the
[Set/OK] buon to execute the deletion.
button
• Recorder mode: From the currently selected song data,
exports (writes) an audio le that can be played in Player
mode.
• Player mode: Imports (loads) the currently selected audio
le into Recorder mode.
button, button
• Rhythm mode: Use these buons to edit the chain, or to
register/deregister memories.
• Recorder mode: Use these buons to OK/cancel operations
such as registering a mark, deleting song data, or exporting.
• Player mode: Use these buons to OK/cancel operations
such as editing a playlist or importing an audio le.
Note: If an error message is displayed, the [Set/OK] buon
blinks. Press the [Set/OK] buon to clear the error and return
to the previous display.
• 3-c: Control buttons, VALUE dial, Display
button
Enters the record-standby state. From the record-standby
state, press the [ ] buon to start recording. You can
record the external audio input from a mic or guitar, and the
rhythm style played in Rhythm mode.
• Rhythm mode: Your performance is recorded along with
the rhythm style playback.
• Recorder mode: Your performance is recorded. Your
performance is also overdubbed onto the recorded song data.
• Player mode: Your performance is recorded along with the
playback of the audio le.
In the record-standby state or during recording, the three LEDs
in the left of the display operate as the recording level meter.
, buttons
• Rhythm mode: If the Chain function is on, these buons
move the position where you will edit the rhythm style.
• Recorder mode: These buons move the recording/
playback position within the song.
• Player mode: These buons move the playback position
within the audio le.
button
Starts/pauses playback or recording.
• Rhythm mode: Starts/stops the rhythm style playback.
• Recorder mode: Starts/pauses song data playback.
• Player mode: Starts/pauses audio le playback.
Note: If the LED above the [ ] buon is blinking, this
indicates that the data is being prepared. Please wait.
, ( ) buttons
• Rhythm mode: Specify a ll-in for the currently selected
rhythm style.
In the record-standby state, these buons select the
recording-destination song number.
• Recorder mode: Select song data.
• Player mode: Select an audio le. If the playlist function
is on, you can hold down the [VAR] buon and use these

KR-55 Pro Owner's Manual
6
buons to switch between playlist banks.
In the record-standby state, these buons select the
recording-destination song number.
() button
• Rhythm mode: Switch variations for the currently selected
rhythm style. If the Chain function is on, this buon returns
to the beginning of the chain.
• Recorder mode: Stops song data recording or playback,
and returns to the beginning of the song.
• Player mode: Stops audio le playback, and returns to the
beginning of the song.
button
This buon species the ending of the rhythm style or the
tempo. To set the tempo, press this buon several times. You
can also press this buon to hear the sound that’s assigned to
the metronome.
• Rhythm mode: When the rhythm is playing, this buon
switches to the ending paern of the rhythm style. When
the rhythm is stopped or when the metronome is on, this
buon species the tempo.
• Recorder mode: Sets the tempo of the metronome when the
metronome is on.
• Player mode: Returns the playback speed to the original
seing.
• System mode: Displays the names of the system items.
• Tuner function: Changes the tuner’s guide tone.
VALUE dial
• Rhythm mode: Adjusts the tempo of the rhythm style or
metronome (48–240).
• Recorder mode: Changes the tempo of the metronome
when the metronome is on (48–240).
• Player mode: Changes the speed of audio le playback
(-25%–+25%).
The VALUE dial is also used when changing various other
seings.
Display
The display shows various types of information such as the
tempo of the rhythm style or metronome, the playback speed
of an audio le, the song data number or audio le number,
the playback position, the values of various seings, the note
name for the tuner function, and error messages.
Song LED
This is lit up if the display shows a song data number or an
audio le number.
Pos. LED
This is lit up if the display shows the current position in the
chain function of Rhythm mode or the playback position of
song data or an audio le.
Edit LED
This is lit up if you are editing or viewing various seings.
Tempo LED
This is lit up if the display shows the tempo of a rhythm style
or the metronome.
REC Level LED
In the record-standby state or during recording (when
the [  ] buon is blinking or lit), the three LEDs at the
left including the Song LED and Pos. LED operate as the
recording level meter. The top LED (Song LED) indicates the
peak, and will light when the input is excessive.
Adjust the recording level so that the top peak LED
ickers occasionally.
Note: If the display is showing something other than the
content described above, these LEDs will be unlit.
Rear panel
21 4 5 67 3
1. DC 9V jack
Connect the included AC adapter (DC 9V) here.
2. jack (stereo mini jack)
Connect your headphones here.
You must connect a stereo plug to this jack. No sound will
be output if you connect a mono plug.
3. FOOT SW jack
Connect a VOX VFS5 foot switch (commercially available)
here.
You can use the foot switch to play rhythm styles and
perform other operations without having to put down your
instrument (see page 25 “Using a foot switch”).
4. AUX IN jack (stereo mini-jack)
Connect an electronic instrument or other audio source here.
You can perform along with rhythm styles played back by
the KR-55 Pro or with music from your audio player. Use the
controls of the connected device to adjust the volume level.
5. OUTPUT L/MONO, R jack (mono phone jack)
Connect this to an external device such as a powered monitor
speaker.
6
. SD card slot
Insert an SD card here (see page 7 “About SD cards”).
7. Battery cover
Install six AA baeries. You can use either alkaline baeries or
nickel-metal hydride baeries.

Setup
7
Setup
Connections
The following illustration shows a typical connection example
for the KR-55 Pro. Connect your equipment as appropriate for
your needs.
Before connecting anything, turn o the power or
minimize the volume to all devices. Careless operation
could damage your speaker system or cause unexpected
malfunctions.
If you connect a mic or an acoustic guitar, acoustic
feedback could occur depending on the position of the
mic or acoustic guitar or the volume of the KR-55 Pro. If
this occurs, take the following steps.
• Move the external speaker away from the mic or
acoustic guitar.
• Change the direction of the mic or acoustic guitar.
• Adjust the volume of the KR-55 Pro.
About SD cards
SD cards that can be used with the KR-55 Pro
The KR-55 Pro can use the following types of SD cards: SDHC
(UHS-I) 4 GB–32 GB recommendation.
Inserting or removing an SD card
1. Make sure that the power is o.
2. Insert the SD card into the SD card slot located on the
rear panel of the KR-55 Pro until you hear the card click
into place.
3. To remove the SD card, push it inward until you hear it
click; then release your nger.
4. The SD card pops out slightly, allowing you to remove it.
Note: For details on how to properly handle SD cards, refer to
the manual included with your SD card.
Be sure to insert SD cards all the way, taking care that the
card is oriented correctly. Do not force a card into the slot.
Do not insert or remove an SD card while the power of the
KR-55 Pro is on. If you do so, the internal data or the data
on the SD card could be lost, possibly rendering the SD
card unusable.
Formatting (initializing) an SD card
An SD card that has been used with a computer, mobile
phone, or digital camera cannot be used with the KR-55 Pro
in that state. Before such an SD card can be used, it must be
formaed by the KR-55 Pro.
You should also format the card in the following cases.
• If the display shows the error message (“Err-Crd-***”) at
start-up .
• If the display shows the error message when playing or
recording a song.
Formatting an SD card
Before you can format the card, you must stop recording or
playback.
Note: Make sure that the SD card is inserted.
1. Press the [SYSTEM] buon to enter System mode (the
buon lights).
2. Press the [M8] buon (the buon blinks).
The display indicates “ Init ” (Initialize), and the [Set/OK]
buon blinks.
3. To format the card, hold down the [Set/OK] buon for
approximately one second.
During formaing, the display's “Init” indication and the
[SD Card] buon will blink.
When formaing has ended successfully, the display
indicates “End”.
If an error occurs, the display indicates “Err.” If you want
to try formaing the card again, repeat the procedure
from step 2.
When you format an SD card, all data on the card is lost. If
the card contains data that you want to keep, back it up on
your computer before you format the card.
Testing whether recording can be done on an SD card
There are some SD cards onto which the KR-55 Pro cannot
record. You can test whether a certain card can be used for
recording. Refer to “SD card test function “tESt”” on page 23.
About recording time
1 Gbyte of memory allows approximately 100 minutes
of recording; i.e., each minute of recording occupies
approximately 10 Mbytes.
Note: These recording times are approximate. As the number
of songs on the card increases, the maximum recording time
decreases slightly.
Note: The recording times listed above are for the rst
recording of a new song. If you overdub, the used capacity is
the total time that was actually recorded.
Viewing the time available for recording
Tip: Here’s how to view the time that is available for
recording on the current SD card.
1. Press the [SD Card] buon. Here you can check the free
capacity of the SD card.
The display indicates “Sd:Fr** (free capacity).”
If the free capacity is more than one hour, the display
indicates 1h, 2h, ... etc.
If the free capacity is less than one hour, the display
indicates 59...00.
Note: In System mode, the display indicates “tESt” and
the SD card test function is selected.
About the write protect setting of an SD card
SD cards have a write protect switch that prevents the data
from being overwrien accidentally and lost. If a card is
protected, you can’t save or delete data on it, use it to record
with the audio recorder, or format the card.
If you need to perform these procedures, you must rst set
the switch to its original position.

KR-55 Pro Owner's Manual
8
Turning the power on/o
The KR-55 Pro can use either an AC adapter or baeries.
Using the AC adapter
Use only the included AC adapter. You risk causing a
malfunction if you use any other AC adapter.
1. Make sure that the power of the KR-55 Pro is o.
Check that nothing is shown in the display, and that the
buons are unlit.
2. Connect the DC plug of the AC adapter to the DC 9V
jack located on the rear panel.
Pay aention to the orientation of the jack when making
this connection.
3. Connect the plug of the AC adapter to an AC outlet.
Be sure to use an AC outlet of the correct voltage for the
adapter.
Using batteries
Baeries are not included. You must purchase them
separately.
1. Remove the baery cover from the rear panel.
2. Install six AA baeries, either alkaline or nickel-metal
hydride, taking care that each baery is oriented in the
correct polarity as shown in the illustration.
3. In System mode, specify the type of baeries that you’re
using.
See page 23 “[M1] Baery type “ba””
If you switch to using a dierent type of baery, be sure
to specify the correct baery type in System mode.
Guitar, bass, etc.
to
an AC outlet
DC plug
AC adapter
Headphones Powerd monitor speaker
VOX VFS5
SD card
MIC ININPUT 1/INPUT 2
Electronic musical
instrument, etc.
Mic

Quick Start
9
Replacing the batteries
Replace the baeries when the power buon blinks.
As the baeries run low, you might hear noise or
interruptions in the sound.
Unusable baeries should be removed immediately. If
unusable baeries are left installed in the unit, they may
leak, causing malfunctions. You should also remove the
baeries if you don’t plan to use the unit for an extended
time.
Be sure to replace all six baeries together as a set. Do not
mix fresh baeries with used baeries in the same set.
Turning the power on
Note: If a device is connected to the AUX IN jack, turn its
power on before you continue.
Note: If you’re using an SD card, insert it into the SD card
slot before you turn on the power (see page 7 “About SD
cards”).
1. On the top panel, set the VOLUME knob to the
minimum level (far left).
2. On the top panel, hold down the power button for at
least one second to make the button light.
When the KR-55 Pro nishes starting up, it is ready to
produce sound.
3. Turn on the power of the external equipment that is
connected to the KR-55 Pro’s OUTPUT L/MONO and R
jacks, such as powered monitor speakers.
4. Adjust the volume on the external output device and on
the KR-55 Pro.
Turning the power o
Never turn o the power or disconnect the AC adapter
during recording, while data is being converted, or while
data is being wrien to the system.
Doing so may make the KR-55 Pro malfunction, or
damage the data on the SD card. If the data on the SD card
has been damaged, format the card.
1. If recording or playback is occurring, press the
[ ] buon to stop.
2. Hold down the power buon for one second or longer
until the buon blinks.
After a time, the power buon and display indication will
go dark, and the KR-55 Pro will shut down.
Use caution when turning o the power!
To turn o the power of the KR-55 Pro, you must press the
power buon located on the panel. (When you do this, the
KR-55 Pro saves its data.)
Never disconnect the AC adapter or remove the baeries
while the power is on.
Quick Start
This quick start section explains the basic functionality of the
KR-55 Pro. Start by reading this chapter to understand the
basic functions; then read the subsequent chapters to delve in
deeper.
Listening to the demo
performances
The KR-55 Pro contains demo song data. Let’s start by
listening to the sound of the KR-55 Pro.
1
4
3
1
2
1. Simultaneously press the [SYSTEM] buon and [Count
Start] buon to enter Demo mode.
The [SYSTEM] buon and [Count Start] buon blink, and
the demo song plays.
The top panel buons light in synchronization with the
demo song.
2. Use the VOLUME knob to adjust the volume of the
demo song.
3. You can press the [ ] or [ ] buons to play the
previous or next demo song.
4. To exit Demo mode, press any one of the mode buons
[RHYTHM], [RECORDER], [PLAYER], or [SYSTEM].

KR-55 Pro Owner's Manual
10
Connecting and playing
instruments
The KR-55 Pro provides a mic input, two inputs for guitar or
bass, and an AUX input, allowing multi-channel mixing. A
variety of input sources are supported, including guitar, bass
guitar, and a microphone.
Playing guitar
Here’s how to connect a guitar.
5
6
1,2
1
1,3
4
1. Set the (INPUT) 1 knob and the VOLUME knob to
the minimum position, and connect your guitar to the
INPUT 1 jack.
2. Use the (INPUT) 1 knob to adjust the input level.
To avoid signal clipping (signal that’s too loud) this knob
should be adjusted so that the peak LED doesn’t light up
when signal is being loudly input.
3. Use the VOLUME knob to adjust the volume that is
being outpued from the OUTPUT L/MONO and R
jacks.
4. Use the TREBLE knob and BASS knob to adjust the
tone.
5. As necessary, use the REVERB knob to adjust the eect.
You can apply a reverb eect to the signals from the MIC
IN jack, INPUT 1 jack, and INPUT 2 jack.
Tip: If you’re using a VOX VFS5 foot switch, you can use
it to turn reverb on/o.
6. If you enable the Acoustage function by pressing the
[ACOUSTAGE] buon, the audio output from the
KR-55 Pro will be heard in an expansive stereo eld.
When the Acoustage function is enabled the wide stereo
eect will be applied to all audio signals output from the
KR-55 Pro.
Turn this o when using headphones. The Acoustage
function is optimal when connecting stereo speakers to
the OUTPUT L/MONO and R jacks.
Using the tuner function
The KR-55 Pro has a built-in auto tuner.
Here’s how to use it to tune your guitar.
1,5
2
1. Press the [TUNER] buon to turn on the tuner (the
buon lights up).
2. To change the calibration, turn the VALUE dial.
You can set the calibration in a range of 435–445 Hz.
By default, the calibration is set to 440 Hz.
3. Play any open string on your guitar.
The note name of the string that you play will appear on
the display.
Tune the string roughly until the desired note name
appears on the display.
1st string/6th string: “E”; 2nd string: “b”; 3rd string: “G”;
4th string: “d”; 5th string: “A”
4. Tune the string accurately while you watch the [(1) 8
BEAT1] – [(24) SAMBA] buons.
The buons act as a meter. Tune so that only the two
vertical columns in the center are lit up.
5. When you’ve nished tuning, press the [TUNER} buon
to turn the tuner function o.
Tip: When the tuner is on, you can use the [M1]–[M8]
buons of the select section to play an audible guide tone.
Choose one of three sounds as the guide tone: guitar, bass,
or piano. The sound is switched each time you press the
[TAP/END] buon.
Display Buon Guide tone
Guit
(guitar) M1–M6 Strings 1–6 (1E, 2B, 3G, 4D, 5A, 6E)
bass (bass) M1–M4 Strings 1–4 (1G,
2D, 3A, 4E)
Pian
(piano)
M1–M8, [(17) 16 BEAT], [(18) 16
BEAT SHUFFLE], [(20)JAZZ]–
[(22)BOSSA]
C, D, E, F, G, A,
B, C, C#, D#, F#,
G#, A#