AC3->Wav through GraphEdit

[NIE]

Sorry, may be my question is stupid but I am a novice.
I have an SB Audigy S-Card. It has a built-in AC3 decoder which appears as "AC3 filter" in GraphEdit list of filters.
All other AC3 decoders does not work properly in GraphEdit - the sound is "hiccupping"
Therefore I have assembled the following scheme in GEd:
Creative AC3 filter->Wav dest->File writer
I have also tried to use
Creative Ac3 filter->MGI wave dest->File writer
The result is always the same:
I can play the final wav with any player (WMP, Creative etc) but any other programm (Sound Forge, Ulead media System) rejects it with the message "Unknown wav format"
BeSweet produced a suitable wav in PCM format but I did not like the sound
Could you help me - what am I doing wrong in GEdit. How to produce a recognisable wav?

[DJ Bobo]

Just use azid in a dos command this way:

azid -c normal -a filename.ac3 filename.wav

or for better quality:

azid -c normal -a -F wav24 filename.ac3 filename.wav

In the second case, the application where you want to open the WAV must be compatible with 24 bit WAV files. If not, dither the 24 bit WAV to 16 bit in a program like WaveLab first.