The DN-S3700 is a "plug-and-play" device for basic CD and USB playback, but to use it as a MIDI controller for software like Serato, Traktor, or Virtual DJ, you need the ASIO drivers (for Windows) or the correct MIDI mapping files. The drivers ensure: Low-latency audio performance. Stable communication between the platter and your software. Proper routing of the internal 24-bit DAC. Where to Download Denon DN-S3700 Drivers
Ensure you are in "PC Mode" on the unit by pressing the Source button until "USB MIDI" is displayed. Modern Compatibility Note denon dn-s3700 driver download
What are you using? (Windows 11, macOS, etc.) Which DJ software are you trying to connect to? Are you getting a specific error message ? The DN-S3700 is a "plug-and-play" device for basic