The NCP3000 Audio C (Multi) Windows driver typically refers to a driver for a multi-channel audio interface or sound card manufactured by Nuvoton Technology (often under the "NCP" or "Nuvoton" branding). The NCP3000 series is part of a family of audio chips that provide support for multi-channel audio setups, such as 5.1 or 7.1 surround sound, as well as other advanced audio features.

These chips are often used in integrated audio solutions on motherboards or in external sound cards. The "C" designation in the name likely refers to a particular variant of the chip or a specific model within the NCP3000 series.