You may hear some unusual audio during some CBS programs.
It's because KWCH is now testing something called Secondary Audio Program.
It's a discriptive service for the blind of visually impaired...a narrator describes what's happening in a scene.
The FCC will soon require stations to have secondary audio.
If it bothers you, you can return to regular audio by turning off the SAP feature on your t-v or remote.
Your remote may also show the button as M-T-S, for multi-channel television sound.