A: Yes, but only via the WDM driver. In OBS, add a new "Audio Input Capture" device and select "Grass Valley Audio Input (WDM)." You cannot use ASIO directly in OBS without a third-party plugin.
A: That indicates you installed a combined video/audio driver package. Right-click it → Properties → Details → check Hardware Ids . If it contains VEN_141F (GeoVision's vendor ID), it is correct. gv audio driver