The Scarlett 18i20 1st Gen Windows driver is the software required for your computer to communicate with the Focusrite Scarlett 18i20 audio interface (1st generation). The Scarlett 18i20 is a USB audio interface used primarily by musicians, producers, and audio engineers for recording, mixing, and playing back audio. It connects your instruments, microphones, or other audio equipment to your computer via USB, and the driver ensures that your system recognizes and interacts with the device.
The 1st Gen refers to the first version of the Scarlett 18i20 interface, which has different drivers compared to later generations.