How can I set the volume controls to my audio device instead of controlling the TV?

This remote supports Volume Lock feature. In order to program the Volume Lock, press and hold MENU and OK keys until the INPUT key blinks twice, and follow the instructions to assign volume controls:

1. To assign volume controls to the TV, press the VOLUME UP key.
2. To assign volume controls to the Audio device, press the VOLUME DOWN key.
3. To assign volume controls to the Spectrum Cable Box, press MUTE.