Blu Ray and 4K UHD Audio Options

[leosantare]

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,

[Woodstock]

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