Is the file copyright-protected (DRM)?
Copyright-protected files cannot be played.

Check the following:

1. Are the [MASTER LEVEL] and [TRIM] controls set to the proper positions? Adjust the [MASTER LEVEL] and [TRIM] controls, watching the level meter.
2. Is the audio level being input to the input terminals properly set? Set the audio level input to the respective terminals according to the connected device.
3. Is the [MASTER OUT 1] terminal being used as an unbalanced output with a monaural cable? With an unbalanced output, the sound will be distorted unless the output is set to an appropriate level. Set the output to an appropriate level using the [MASTER LEVEL] control.

The language of the song information of DDJ-SX2 may not be supported by the connected DJ software. For information on the languages supported by the DJ software, see your DJ software's operating instructions.

Since MP3 and ACC format files support ID3 tags used to embed song information, the artist names and album names can be read and displayed from the files (however, if ID3 tags are recorded in Shift-JIS format, characters may not be displayed correctly). On the other hand, WAV and AIFF files do not support the ID3 tag, thus song information such as artist names and album names cannot be read and displayed from the files. To display song information, you must use the Edit item to edit the song information. With the Import from iTunes function, since the file information held by the iTunes library is referenced, song information is displayed even when included as part of WAV or AIFF files.

When the master tempo mode is turned on, key control processing is performed to keep the key constant, so the sound quality changes. This change in sound quality is normal considering the product’s specifications; it is not a malfunction.

Is the DDJ-SX2’s "CROSS FADER CURVE selector switch" set properly?
Turning the "CROSS FADER CURVE selector switch" fully clockwise results in a sharply rising curve.
With DDJ-SX2, you can adjust the crossfader cut lag in 53 steps in the utility mode. For details, see the operating instructions of DDJ-SX2. You can download the operating instructions from this page.

The characters will be garbled if Shift JIS is used as the ID3 tag's character code.
Only Unicode is supported with this application.

Check the following.
(1) Is the jog dial dirty?
An electrostatic system is used as the detection method in the jog dial of DDJ-SX2. Therefore, if the jog dial is dirty or the user has hand cream on their hands, it may not respond.

When cleaning the jog dial, dry wipe it with a soft cloth. If it is very dirty, prepare a 5:1 or 6:1 solution of water and neutral detergent, immerse a soft cloth in the solution and wring the cloth out well, then clean the jog dial and wipe it with a dry cloth after that.

(2) Is the sensitivity of the jog dial's touch sensor set to the minimum value?
Adjust the sensitivity so that the jog dial responds to touching. For details, see "Adjusting the sensitivity of the jog dial's touch sensor" in the operating instructions.

(3) If the jog dial does not respond to touching even though the jog dial's touch sensor is set to the maximum value, check the following.

-Touch the jog dial while touching anywhere on DDJ-SX2.
If the jog dial does not respond to touching, DDJ-SX2 may have a problem.
If the jog dial responds to touching, DDJ-SX2 may be subject to the influence of connected devices.

-The jog dial’s touch sensor may not work properly depending on the connection environment (ground connection status, etc.) of some computers (e.g. a BTO computer) or amplifiers connected to DDJ-SX2.

Check the following.
-Check by connecting the [Signal GND] terminal of DDJ-SX2 with the GND terminal of the computer or with the [Signal GND] terminal of the amplifier.

Caution
This connection is not a standard method. When you use an analog player, noise may occur.

The slicer function cannot be used with tracks for which no beatgrid is set. For details on setting beatgrids, see the Serato DJ software manual.
http://serato.com/dj/downloads#more-downloads

When multiple ASIO drivers are installed into a computer, it may take time for the controller to be recognized by Serato DJ.
Please uninstall unnecessary ASIO drivers.
Please ask the manufacturers of ASIO drivers for details of how to uninstall them.

ASIO driver: A type of driver software which controls sound input and output between a computer and a soundcard (audio interface).

QuickTime of Apple is needed to play the music files in AAC format.
Please install QuickTime into your computer.
After installing QuickTime, launch Serato DJ and untick "Show iTunes Library" in Library + Display on SETUP window in Serato DJ.
Then, tick it again to start using these files.
Please ensure iTunes is updated to the latest version.

Also, please see the FAQ in the Serato website from the following link:
http://serato.com/dj/support/16981/itunes-aac-tracks-are-shown-but-will-not-play-on-your-windows-machine

iTunes and QuickTime are trademarks of Apple Inc., registered in the U.S. and other countries.

QuickTime of Apple is needed to play the music files in AAC format.
Please install QuickTime into your computer.

After installing QuickTime, launch Serato DJ and untick "Show iTunes Library" in Library + Display on SETUP window on Serato DJ.
Then, tick it again to start using these files.
Please update iTunes to the latest version.

Also, please see the FAQ in the Serato website from the following link:
http://serato.com/dj/support/16981/itunes-aac-tracks-are-shown-but-will-not-play-on-your-windows-machine

iTunes and QuickTime are trademarks of Apple Inc., registered in the U.S. and other countries.

Please ensure [M] (Master output) is selected as the Sampler sound output.
Some users reported that [1] (Deck 1) instead of [M] was unintentionally selected as the Sampler sound output when they installed Serato DJ for the first time or they updated Serato DJ software.

Is the CROSS FADER ASSIGN (A, THRU, B) selector switch properly set? Set the [CROSS FADER ASSIGN (A, THRU, B)] selector switches for the respective channels properly. If the INPUT selector switches of CH3/4 are set to MICI1/MIC2, the sound does not change even when the crossfader is moved, regardless of the position of the CROSS FADER ASSIGN selector switches.

Is the microphone talk over function on, and is a microphone that is on and connected to DDJ-SX2 placed near a speaker?
When the microphone picks up the speaker sound, the talk over function is activated and make the output sound smaller unexpectedly. Turn off the talk over function or the microphone, or use the microphone away from speakers.

The talk over function may be accidentally activated due to the influence of static electricity, etc. If you do not want to use the talk over function, turn it off.

Is the [STANDBY/ON] switch of the power on?
Turn on the [STANDBY/ON] switch of the power.
Is the included AC adapter connected properly?
Connect the power plug to the included AC adapter properly.

DDJ-SX2 may not operate properly due to static electricity or other external influences. In this case, proper operation may be restored by turning the power off, waiting 1 minute, then turning the power back on.

1. Is DDJ-SX2 recognized by the computer?
　The issues of DDJ-SX are explained in the linked page.
　Please replace DDJ-SX with DDJ-SX2 when you read the explanation in the linked page.

2. Is the MIDI controller setting of DDJ-SX2 set to "Forcefully use the unit as the general MIDI controller"?
Enter the utilities mode and if the [ROLL Mode] button on the left deck is lit, press the [HOT CUE Mode] button. For details, see "Changing the settings" in the operating instructions.

When the unit is connected to a computer (Windows) for the first time or when it is connected to a different USB port on the computer, the message "Installing device driver software" may appear on the computer screen. Wait until the message "Your devices are ready to use." message appears.

-In the middle of installation, the message "Connect to Windows Update to search for hardware? ] message may appear. In that case, select [No, not this time] and then click [Next] to continue installation.
- In the middle of installation, the message "Choose the installation method" may appear. In that case, select "Install software automatically (recommended)" and then click "Next" to continue installation.
- In the middle of installation, the [Windows Security] screen may appear. In that case, select "Install this driver software." to continue installation.

From the Control Panel, check that the account type in "User Account" is "Computer Administrator". You cannot install the device software if it is not "Computer Administrator".

The firmware update is probably not finished. Turn off the power, enter the update mode again, and then perform the update.
For details on the procedure, download the update guide from the firmware download page.

If audio is not output or you cannot control rekordbox when using Windows, please see here to solve the problems.