For the last 2 weeks, I've been having audio dropouts on my local Fox channel which my HR21-100 gets via the AM21. Audio is output via HMDI to my Sony AV receiver for 5.1 audio. This setup has not changed in months, and this channel (40.1) has come in fine for the 2 years I've lived here. Now when watching either live or recorded content, I get a half second audio dropout about every 60 seconds or so. The video is fine, just the audio is effected. I've been in contact with the station engineer and he says he hasn't experienced the same dropouts at his home, nor do his station logs show any errors. I rebooted the HR21 but that didn't help. I then went into the HR21 audio settings and turned off the DD so that it was only outputting PCM. I then rewound to a point where I know a dropout occurred with DD on and the dropout was not present. I then turned DD back on a rewound to the same point and the dropout was again present. I want to keep DD on for obvious reasons. I'm only having this problem on this one OTA channel; all other OTA channels and all SAT channels are fine. Any ideas what could be causing this? Any ideas of how to fix it?