How do I *stop* the TiVo remote from adjusting volume on VIZIO sound bar?

The TiVo remote adjusts the volume on BOTH the VIZIO sound bar and the VIZIO Smart TV at the same time. That makes for a very touchy volume control since it turns up the speakers as well as the input to the speakers. I would rather keep the sound bar at a fairly high level and then use the TiVo remote to adjust the TV volume to control the input to the sound bar.



I hope that makes sense!