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Why is AC3 muted compared to MP3 on my PC?
Posted: Tue Jan 15, 2008 4:43 am
by DavidJones4
When I record either DD2CH or 5.1 as a transport stream{tp file} the sound is muted compared to my scaled down files with MP3 sound, ie, when I reduce a 400mb tp file to 99mb's with 192k mp3, it's louder than the original ac3 file in the tp......why is that?
Posted: Tue Jan 15, 2008 6:57 am
by Shane
This might be a silly question, but do you have a 5-speaker system hooked up to your PC? If you play AC3 through only the L and R, it will be muted since most dialog comes over the center channel.
Just my first thoughts ...
- Shane
Posted: Tue Jan 15, 2008 2:20 pm
by DavidJones4
I'm using a 2.1, but even music lacks the grunt that my converted mp3 files have, basically no matter what the content, it sounds 30% louder and no less clear as an mp3.
Posted: Tue Jan 15, 2008 2:39 pm
by akirby
Is there a separate volume control?
Posted: Tue Jan 15, 2008 2:54 pm
by DavidJones4
I don't know, but I've shared some of my vids with my online buddies, and they also accept that MP3 sounds better, at least with a 2.1......
Posted: Wed Jan 16, 2008 6:14 am
by jcook01
Is it possibly due to the inherint dynamic range of the AC3 encoding/decoding system? Can you turn on the late nite (compander) function that will minimize audio peaks and increase low level audio?
Posted: Wed Jan 16, 2008 7:03 am
by DavidJones4
I'm using xp pro....where do I find those controls...?