If it's a hiccup with DVD-A and it continues to occur, I'd look closely at the player and associated cabling - the 1070 sees that as just an analog signal so it's not doing much with it (just volume control typically, plus some analog bass management if the rear panel switch is in "HPF/LPF" position), but I had similar problems with a number of DVD-A discs while beta testing the OPPO 981HD and ended up finding that the problem was somehow related to my cabling (which still confuses me since SACD and regular CD/DVD output as analog from the player all worked fine, but oh well...).

If you have brief pauses in audio while watching TV, keep an eye on the front panel display to see if the signal format flashes up briefly in place of the processing mode. Particularly with HDTV, stations will change the format of the audio between broadcast and ads - ads often being Dolby 2.0, while broadcasts are sometimes Dolby 5.1. When that happens, the receiver has to re-acquire the signal and start decoding it properly - and during that re-acquisition, it mutes the audio so you don't get any mis-decoded noise.