The "software" in this context primarily consists of the Windows drivers required for the computer to recognize the hardware as a valid input (microphone) or output (speakers) device.
Many MVSilicon B1-based 7.1 USB sound cards actually use a C-Media CM6206 or CM108 firmware layer. A known community fix involves using the C-Media 7.1 USB Audio Driver (version 8.0.0.1 or newer). mvsilicon b1 usb audio software hot
Universal Support: The interface is generally driver-free for basic use on Windows 10 and 11, appearing as "mvsilicon B1 usb audio" in system sound settings. The "software" in this context primarily consists of