What happens if....

[rc10mike 10+ year member]

You only have 5.1 speaker setup and you attempt to play Dolby True HD or DTS MA?

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[bbgambino71 10+ year member]

nothing.. only a select titles have 7.1 anyways. dolby truehd, dts ma, and lpcm are just codecs... so they don't have anything to do with 5.1 or 7.1 or 2.0 etc