Problem with sound

[jarko]

Hi

I have a very strange problem. I have 2 video files (movies) and everything is ok but sound of talking is very low almost not existing. the music and backroung sounds are perfect - volume and quality.
Please help me because I already threw away few files with the same problem but somebody told me that there is some way to fix it.

[redwudz]

What audio format are they? If it's AC3 5.1 audio, the center channel may not be working properly with your player. That's where the voice tracks mainly are, AFAIK. If it was down mixed from 5.1 to stereo, they may have done a lousy job. In that case, there's not a lot you can do because any level increase will also raise the music, etc., levels.

You can drop one into Gspot 2.70 to see the audio formats, or most software players will tell you the audio format.

If they are 5.1 and the low level is because of the file, not your player, then someone else will have to help you on increasing the center levels, I haven't tried that.

[jarko]

From VirtualDub

Audio stream

Sampling rate 48000Hz
Channels 5
Sample precision N\A
Compression Unknown(tag 2000)
Layout 94671 chunks (0.50s preload)
Lenght 181789440 samples (1:03:07.28)
Min/avg/max/ttotalframe size 960/1920/24000 (177529K)
Data rate 384 kbps (1.23%overhead)

[jarko]

These files they played this way on computer it doesn't matter what player i'm using.
When I try to change audio codec in VirtualDub and i try to change codec i cannot do it because it shows codecs names but on right side it doesn't show for example bytes per block

[dnix71]

This DD forum suggests installing an ac3 codec.

http://forum.digital-digest.com/archive/index.php/t-51245.html

The "Compression Unknown(tag 2000) " means ac3 audio.

Also here: http://www.free-codecs.com/download/AC3_Filter.htm gives the same suggestion.

[jarko]

Thanks a lot. You were right. Somehow my AC3ACM codec was missing. I installed this before but probably something happened and it was not working properly anymore. Thank you again with out your help I'll never get solution.

[dnix71]

If you installed Perian you must choose a pref from the "A52preferences" setup.
It allows you to force stereo output from 5 channels if your computer doesn't have 5 channel ouput.

If you installed Perian, go back find the folder with the codec, readme file and A52preferences file. Double click the A52preferences and set it properly.