[ADTech]

I've yet to see an audio-only problem that was directly attributable to a fault or problem in the antenna system. As far is the incoming signal at the antenna is concerned, there is no distinction in the digital system between audio, video, or any other component (except the pilot carrier), it's all just data packets that have to be reassembled in the tuner section of the receiver.

If you think it's the antenna, move it several yards and try again. Note that channels 8 and 10 come from La Jolla, the rest to your southeast. Many folks need separate antenna elements pointing in different directions to pull off reception in your area.

If you have another TV set, give it a try to see if it behaves differently. There are differences between various tuners.