Advertisements DD 5.1 typically places dialog in the center channel, music and effects in L and R, and surround info in LS and RS. There is supposed to be a local mixdown at your tuner to DD 2.0, which mixes the dialog also into L and R creating conventional stereo, and that is controlled by metadata flags in the transport stream. If they don't parse the metadata properly at the station, sometimes there is no mixdown, and DD 5.1 L becomes DD 2.0 L, while DD 5.1 R becomes DD 2.0 R, meaning no dialog reaches either speaker. This is probably what was referred to as a "garden-variety" failure, which is a head-scratcher of a characterization. One translation of that is "common", or "something we F up regularly ".