Convert DTSHD Master Audio to TrueHD for WDTV

[bobthegoat2001]

It would be nice to be able to convert the DTSHD Master Audio to Dolby TrueHD in M2TS files (just convert the audio, and pass through the video without converting). This would allow me to play the HD audio with my WDTV since it supports TrueHD but not DTSHD Master Audio and I shouldn't loose any audio quality since they are both lossless formats.

[Quantumleap]

Only DTSHD to DTS or AC3 (DolbyDigital)
But no DTSHD to TrueHD possible at the moment.
There is no normal user program which can do that at the moment.