I have the same problem with the missing bass, even with the latest firmware update. Maybe this is also a USB driver conflict? In the Device Manager under the "Events" tab of "VIVE Pro Multimedia Audio", "Speakers (VIVE Pro Multimedia Audio)" and "Microphone (VIVE Pro Multimedia Audio)", the following notes from the driver, "Requires additional installations", "was generated not migrated to a partial or ambiguous match ". (Automatic driver search does not yield results.)
Has anyone tried to delete all old Vive drivers and reinstall again?