Well, the problem behind DTS HD HRA files is quite simple. Those files are treated like DTS-HD Master Audio files, which is wrong. On Master Audio files the player opens the audio device by an 8 channel 192Khz manner and that is not applicable to HRA files. (but the player is doing so -> no audio or crippled audio) HRA files work with the audio device opened in a 2 channel 192Khz (and a sample rate of 192000 instead of 768000) manner. Shown like on the mpv repo on github (https://github.com/mpv-player/mpv/pull/6209)
I hope a fix for those HRA files finds its way into the android (tv) app. Right now movies with an HRA track are unwatchable which is kinda sad. (in Germany there are many Blu-rays with such an audio track)
