Since about Thursday the sound is nearly zero on the NBC feeds to Ch 4. It is ONLY on the network shows, NBC News, The Tonight Show and Saturday Night Live. On the comedies the laugh lines and sound effects come through loud and clear while the main "mike" is NEARLY totally dead. I have never heard of such a thing. I do have and old TV and the converter box deal (no cable or dish) but I can find no grounds to blame that system because it is so specific AND constant. ANY ideas anyone? Is it NBC, KFOR, my converter, my TV, some combination? Please help if you have a club.

(I thought I had posted this earlier but can't find it now. If I double posted, I am sorry)