It takes a long time for Serato DJ Lite to show the virtual decks after I launch the application. Why?

When multiple ASIO drivers are installed or multiple audio devices are connected to your PC, it might take a long time for Serato DJ Lite to recognize the OMNIS-DUO.

Disconnect audio devices other than the OMNIS-DUO and uninstall unnecessary ASIO drivers and virtual audio devices. Visit the website of the relevant manufacturers for details of how to do this.