Riff audio not convertable

[benten2000]

Can someone please help me with this majot problem.

I have a few audio files that i've found out to be riff wave files, but this files are unplayable so far.
What I'm trying to do is to make them playable and to convert them to a normal wave format.
Does anyone know of a process that can help me please.

DETAILS OF FILE.

RIFF 'WAVE' (wave file)
<fmt > (format description)
Microsoft ADPCM format
2 channel
22050 frames per sec
88200 bytes per sec
4 bytes per frame
16 bits per sample
<data> (waveform data - 4072933 bytes)
<ump3> (8 bytes)
"····l":·"
(0,0,0,0,108,34,58,0)

Hope the info helps.

[johnman]

could you copy paste the first +- 100 bytes (HEX) from the wav? I think i can find out how you can decode the wav.

like this

52 49 46 46 24 C0 93 03 57 41 56 45 66 6D 74 20
10 00 00 00 01 00 02 00 44 AC 00 00 10 B1 02 00
04 00 10 00 64 61 74 61 00 C0 93 03 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

[benten2000]

Hope this is enough.

5249 4646 1A26 3E00 5741 5645 666D 7420
1000 0000 0200 0200 2256 0000 8858 0100
0400 1000 6461 7461 E525 3E00 0800 0000
D844 7400 6113 0000 D804 0000 0006 0000
0200 0000 6400 1A02 0100 0000 0000 0000
0400 0000 0100 0000 0200 0000 0200 0000

Big thanx for you help so far.
I have a fair few files in this format an would hope you can help me decode them all.

:)

[johnman]

i have tested your header and i found out that th "format tag" is not a standard WAVE_FORMAT_PCM or WAVE_FORMAT_IEEE_FLOAT but WAVE_FORMAT_ADPCM.

the first two are the normal formats which are usually suported by most programs. Your file however has a different type which i now nothing about.

I have to go to bed now (have to get up early tomorrow) but i will look into this a little more tomorrow, and maybe ill make a programm which can handle this type .
I cant promise anything, but i think ill find a solution.

BTW i see now that you wrote it in your first post its Microsoft ADPCM format :).


Have you any idea where these files come frome? I have never seen such a file before.

[benten2000]

They files came from the PC Game Rayman 3, all the audio files where placed in one large file which I managed to extract all the files from inside.

Cheers for all your help so far, very much appreciated.

[Cyberman]

It´s a wild guess, but perhaps installing the ADPCM codec would help?
Or is it installed anyway, as Windows standard?

[benten2000]

I have tried these codec's:

IMA ADPCM Audio Codec
Microsoft ADPCM Audio Codec
Even tried the Xbox ADPCM Audio Codec

But sadly still wouldn't play, unless someone knows of any other adpcm codec's I could try.

[Cyberman]

Did you try to open it with SNDREC32? Maybe that can open it, it´s a rather old program, I think. And made for WAV files.

[benten2000]

Yeah tried that, it can open the file but can't playback or save as a new format.

[johnman]

i have the specs from the codec but i dont have the time right now to modify my program so it can decode it, so for now im afraid i cant help you any further.

[benten2000]

thanx anyway for all your help, if you ever get a chance to then I would be very grateful.

[Cyberman]

If the file´s not too large(say, up to 1MB), could you upload it somewhere?

[benten2000]

Okay, I've hosted one of the smaller files I could find (866.91kb)

TEST FILE (http://www.benten2000.plus.com/audio/tester.wav)

[Cyberman]

I don´t think the file´s an valid WAV file. It contains a WAV header, but the data probably has been scrambled for protection.

Try to search the web, maybe the company´s known for that, and there are explanations how they did it.

I once had a similar situation - with a file from the DUCK corporation - turned out they simply shifted the bits to scramble it - no program could play the file, even though it´s header were valid...