Has anyone had the audio suddenly go from normal to loud static buzz (using hdmi for audio) ? Both of my Roamio basics have done this from time to time, both before this last spring's update and after. Most recently mine did it last night, I was simply changing the tuner from one to another who suddenly all I could hear was a static buzz, much like if you tuned your FM radio to blank frequency. It lasted about 2 or 3 seconds, it's just on the one tuned channel as if I change channels it remains but if I switch to another tuner, it goes away. My audio output is set to PCM however I have had audio set to Dolby and it still occurs, when this happens, it's the audio over hdmi, Toslink optical doesn't seem effected.