There is currently a known issue with the Pioneer DJM-S9 driver not receiving DVS control signal correctly until the mixer has been power cycled.

Please turn your mixer off and then back on again after installing the DJM-S9 driver to allow the driver to connect correctly. The mixer will establish a DVS connection after it has been restarted.

Open the SETUP screen of Serato DJ and check the scope views to ensure you are receiving the correct signal. Check the input type in the AUDIO tab to make sure you are using Turntables or CDJs respectively.

This is only required upon first installation of the DJM-S9 driver.