PS3 And My Z-5500

[ADRiiAN`]

I have a PS3 hooked up with the Z-5500's using the optical cable, and I am using the Linear PCM setting instead of the Bitstream setting.

Now I know with Bitstream, the surround system does the encoding and with Linear PCM, the player (PS3) does the encoding.

I've read that people should use Bitstream for the PS3 Blu Ray Setup, i'm wondering, why though? I just played Transformers and I was constantly switching between Bitstream (which displayed audio Multi-Channel 448 Kbits (Something like that), and LPCM showed (Dolby TrueHD 4.2 Mbits) (I know that with the Z-5500, it'll take the core which is around 1.5 Mbits, which is still better than 448 Kbits).

To me, LPCM sounds MUCH better, it's much louder with more bass and the 5.1 is much better, For example, in the classroom where Sam is selling his grandfather's stuff, the kids are laughing, and I could hear it in the rear speakers, but in Bitstream, I couldn't.

So I was wondering why people say to Bitstream instead of LPCM?