Firmware updates for the actual hardware (the mixer or mic) are usually provided by the brand-name manufacturer
The only exception is the variant, which supports firmware updates via a dedicated SPI programmer. mvsilicon b1 usb audio software upd
Are you experiencing a specific or static noise with your B1 device after the update? Mvsilicon B1 Usb Audio driver - DriverDouble.com Firmware updates for the actual hardware (the mixer