Sound comes out of my headphones or speakers incorrectly. Why is this happening?

There are 3 things to consider: settings, operation, and connection.
Please check each in the following sequence:

1) Confirm the audio output routing
1. Open rekordbox Preferences.
2. Click [Audio].
3. Check that each item is selected as follows:

■ Windows
Audio: DJM-S11 ASIO
Mixer Mode: External
Output Deck1: DJM-S11 ASIO: CH1
Output Deck2: DJM-S11 ASIO: CH2
Output Deck3: DJM-S11 ASIO: CH3
Output Deck4: DJM-S11 ASIO: CH4
Output Sampler Deck: DJM-S11 ASIO: SAMPLER VOL

■ Mac
Audio: DJM-S11
Mixer Mode: External
Output Deck1: DJM-S11: CH1
Output Deck2: DJM-S11: CH2
Output Deck3: DJM-S11: CH3
Output Deck4: DJM-S11: CH4
Output Sampler Deck: DJM-S11: SAMPLER VOL

*If you can’t select the correct choice because it isn’t displayed or an error has occurred etc., refer to [Troubleshooting _ rekordbox] > "I can't set [AUDIO] in the rekordbox Preferences correctly.".

2) Check the volume level operation
1. Play a track.
2. Set the TRIM knob to the center (12 o’clock).
3. Slide the channel fader to the top.
4. Slide the crossfader to the center.
5. Turn the MASTER LEVEL knob to 2 o'clock.
If the MASTER LEVEL indicator lights up more than half way, there’s no problem in the settings and operation.
If you don’t hear any sound from the headphones at this point, check the following:
6. Turn the HEADPHONES MIXING knob to the center.
7. Turn the HEADPHONES LEVEL knob all the way to the left.
8. Slide the headphones cue fader to the center.
9. Turn the HEADPHONES LEVEL knob slowly to the right.

3) Check the connection of speakers and headphones
For details, see [Example of connections] in the Quick Start Guide.
Even if you’ve already connected them, reconnect your speakers and headphones to make sure they’re properly connected.
You can read the Quick Start Guide [here].