> Is AUD file uses IMA-ADPCM Compression right?

Yes.

> so I think maybe I can get original ADPCM data and put in a WAV file because RIFF WAVE can support IMA-ADPCM too... to get that "original data in original quality"
> my friend wrote a program so I can eliminate aud's file header and chunk header
> but when I put these data(I think it's the ADPCM data) in a WAV file, I can't open it. I believe my WAV header is no problem and there is no more chunk header in these data.
> I use some WAVE Editing software it reports no samples.
> But in Players like WinAMP it can give song length but still can't play.
> Why?

I have no idea.

> and forgive my poor english...

What do you want to do with the data?
If you convert it to WAV, you still have the original quality.

Olaf van der Spek

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