I don’t know if this is a Dish issue or an NBC issue. But for the past several weeks (or months), I’ve noticed a weird hissing sound on some of the NBC prime time shows. Especially the Chicago shows (fire, Med, PD). You don’t hear it when the actors are talking. It’s when background music is playing. I especially notice it at the beginning of the episodes when they’re showing the “previously on” portion. It’s a really annoying hum or hiss. Has anyone else noticed this?