[vlc] audio decoder glitches?

[jon]

Greetings,

I'm going to start this letter with an apology in case the problem i'm 
about to describe is a general waste of everyone's time due to my own 
incompetance.  I've searched online through various vlc troubleshooting 
forums and i have found mentions of issues similar to this in very old 
versions of vlc (which i never had such trouble with) but no real 
solutions suggested.

That said, I seem to be experiencing some sort of audio decoder 
malfunction using vlc 0.4.4 in linux.  The soundcard I use is an aureal
vortex 2, which has basically unfinished drivers and has certainly 
caused me incompatability problems in the past becasue of this.  At the 
moment however, vlc is the only program i have that seems to be 
experiencing this problem.

The problem itself is in the form of loud crackling/popping noises 
during dvd playback.  I've tested various other encoding formats and 
have noticed the issue on some mpegs, but not ALL mpegs, however ALL 
dvd's seem to crackle the same way... lower/louder frequencies seem to 
cause some sort of digital audio decoding error that makes loud 
crackling / popping noises come out of the speakers.  It should be noted 
that there is no other evidence of audio distortion/clipping or 
overdrive... it simply seems like there's a threshold below which only 
loud crackling noises come out of the speakers.  My best guess based on 
this NOT happening with all mpeg files (perhaps the difference is 
between mpeg1 and mpeg2?) is that it may have something to do with one 
of the audio decoder modules, perhaps the software ac3 audio decoder.

Has anyone out there run into problems like this?  Is there a known 
solution?  Any advice or info is welcome.  I can provide other system 
specs / version info if it will be of help.

Oh, and for whatever it may be worth the copy of vlc 0.4.4 i run on my 
TiBook in OSX does NOT have these audio glitches.

thanks,
~jon

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