The B1 chip often supports a 4-pole TRRS combo jack. Without the correct .inf driver, Windows sees only output, not input.
MVSILICON B1 uses a near-identical command set to the C-Media CM108/CM119 family. Download the C-Media 3D Sound Driver (version 8.XX or later). During installation, it will recognize the B1 hardware ID.
The MVSilicon B1 (and the related B series chipsets) is a highly integrated System-on-Chip (SoC) solution widely utilized in consumer-grade USB audio interfaces, USB microphones, and external sound cards. Unlike simple USB audio controllers (such as those from C-Media or Synaptics which rely heavily on fixed hardware logic), the MVSilicon B1 architecture relies on a combination of hardware DSP and a proprietary, embedded firmware stack.
A "Software Update" for the B1 platform is not merely a driver installation on the host PC; it typically refers to a Firmware Over-The-Air (FOTA) process or a RAM-Load mechanism where the host driver injects new operational code into the chip upon enumeration. This technical brief details the architecture, update procedures, and risk mitigation for the B1 software update process. mvsilicon b1 usb audio software upd
Once you have the driver file (usually labeled Setup_MVS_B1_v2.3.exe or similar), follow these instructions precisely:
Prerequisites: Disable antivirus temporarily (false positives are common on generic drivers).
Step 1: Remove Old Drivers
Step 2: Run the Updater
Step 3: Reboot
Step 4: Plug in the Device
Step 5: Launch the Control Panel
After completing the "mvsilicon b1 usb audio software upd" process, confirm it worked: