Three main factors can cause this and there are three possible countermeasures.

■When the Windows built-in sound device setting is the cause

Refer to case 4 in the troubleshooting guide [here].

■When the connection or other equipment is the cause

An unstable connection with your PC/Mac may cause this problem.

To solve this, shut down your PC/Mac and disconnect all other USB devices and USB hubs.

Then, connect the unit directly to a different USB port.

■When your system (PC/Mac) is the cause

The following may solve the issue:

- Quit all other applications

- Disconnect from the internet and exit security software

- Turn off wireless connections such as Wi-Fi or Bluetooth

- Turn off power-saving settings

If your computer's system doesn’t meet the requirements of rekordbox, it may cause the issue.

Read details on system requirements [here].