Unlike some older gear, the Numark NVii is for macOS, but requires specific ASIO drivers for Windows . These drivers manage the communication between your USB port and the internal sound card of the NVii, ensuring you get the lowest possible buffer size without "crackling" audio. 2. Where to Download the Official Drivers
Scroll down to the Downloads section at the bottom of the page. download numark nvii drivers for windows
If you have an older Numark driver installed, go to Settings > Apps > Uninstall and remove it first. Unlike some older gear, the Numark NVii is