I have used both Dirac Live and ARC.  Both are easy to use and both will deliver excellent audio reproduction.  Dirac Live is slightly more precise and has slightly more detail than ARC.  This is more apparent with multi channel music than movies.     No issues with Dirac Live and ARC with sub woofer integration. Have the T758V3 for a few months, no issue with bass management, nor HDMI.  From what I read Arcam botched their Dirac Live implementation and took their time to fix th
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