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I believe that Infuse will decode DTS-HD MA & TrueHD and pass that on as lossless PCM up to 7.1 channels of 24-bit, 48KHz audio.
This may help shed some light. Audio Options & Capabilities – Firecore Support
Edit to add: Here’s another thread where James explains this. Can infuse pro play DTS-HD Master Audio and Dolby TrueHD sound tracks? - #4 by james