Sound comes out of my headphones or speakers incorrectly. Why? [rekordbox]

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

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

 

■ Windows
Audio: OMNIS-DUO ASIO
Mixer Mode: OMNIS-DUO (External)
Output Deck1: OMNIS-DUO ASIO: CH1
Output Deck2: OMNIS-DUO ASIO: CH2
Mixer Mode: MIDI Control (Internal)
Output Deck1: OMNIS-DUO ASIO: Master
Output Deck2: OMNIS-DUO ASIO: Headphones

 

■ Mac
Audio: OMNIS-DUO
Mixer Mode: OMNIS-DUO (External)
Output Deck1: OMNIS-DUO: CH1
Output Deck2: OMNIS-DUO: CH2
Mixer Mode: MIDI Control (Internal)
Output Deck1: OMNIS-DUO ASIO: Master
Output Deck2: OMNIS-DUO ASIO: Headphones

 

*If you can’t select the correct choice because it isn’t displayed or an error has occurred etc., refer to [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 halfway, there’s no problem with the settings and operation.
If you don’t hear any sound from the headphones at this point, check the following:
6. Turn the HEADPHONES CUE/MASTER knob to the center.
7. Turn the HEADPHONES [LEVEL] knob all the way to the left.
8. Turn the HEADPHONES [LEVEL] knob slowly to the right.

 

3) Check the connection of speakers and headphones

For details, see the Quick Start Guide.
Even if you’ve already connected them, reconnect them to make sure they’re properly connected.
You can read the Quick Start Guide [here].