Does LPCM pump out more bass than ac3/dts?

[yoda313]

I was watching my new U2 VERTIGO concert dvd and on a whim switched to PCM. The BASS was way up and I was pretty suprised. The disc has dolby and dts on it but neither were as loud as the lpcm stereo track.

Why would that be?? I have other concert discs and I'm going to experiment. I believe they all have pcm tracks, well most of them anyway.

Anyone have experience in this?

[steveryan]

I think PCM audio is not compressed like DD and DTS, could be the reason it sounds louder?

[yoda313]

I think PCM audio is not compressed like DD and DTS, could be the reason it sounds louder?

Yeah I'm also thinking it might be whatever redirect mode I have setup up on my sony digital receiver..

[celtic_druid]

Probably more down to mastering. Just because something is compressed doesn't mean that it can't be loud.

[Xoanon]

LPCM discs have the bass from all of the channels in 5 .1 setup dowmixed into two channels, for best sound playback on a non-home cinema setup. This is why it sounds so bass heavy - two speakers are handled the same amount of bass that is playing from six speakers in the 5.1 mix

[yoda313]

LPCM discs have the bass from all of the channels in 5 .1 setup dowmixed into two channels, for best sound playback on a non-home cinema setup. This is why it sounds so bass heavy - two speakers are handled the same amount of bass that is playing from six speakers in the 5.1 mix

Thanks that makes sense