Your DacMagic 100 will arrive ready to plug-and-play in USB Audio Class 1.0 mode, supporting digital audio up to 24-bit/96kHz.
For use in USB Audio Class 2.0 mode, the Cambridge Audio USB Audio 2.0 Driver will need to be installed. In this mode the DacMagic 100 can support digital audio up to 24-bit/192kHz. Information regarding this can be found here:
From this page, download the relevant .zip folder containing the correct driver version for your operating system. And then unzip the folder.
This folder will contain an installer for the driver, and a .pdf containing installation steps, and information regarding the use of the driver.
Please note: This driver is not required for use of USB Class 2.0 Audio with Mac.