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Hello,

Do all Blu Ray discs have either a TrueHD Surround or DTS-HD MA Surround audio option?

Do all 4K UHD discs have either a TrueHD Surround or DTS-HD MA Surround audio option?

What is better, DD Surround or LPCM Surround?

Thank you,

1. No, they don't.
2. No, they don't.
3. LPCM is not compressed. Dolby Digital is. You can decide for yourself.