Help to decode MS ADPCM (Just Dance 2017) by vladik4kides at 11:45 AM EST on November 21, 2016

Hey! I need someone to find me coeffs for my file which I got from Just Dance 2017 (PC). Here are some examples most likely with different amount of channels: Download samples
Here is picture with HEX of one of the file if you interested (00000678.rak):

It would be nice if I could get any help. Thanks in advance!

edited 11:45 AM EST November 21, 2016

edited 4:36 PM EST November 21, 2016

by Nisto at 1:03 PM EST on November 21, 2016

I'm not at all familiar with MS ADPCM; what would you use to play this once you have the coefficients? VGMToolbox doesn't ask for any coefficients for any of the available Microsoft codings when generating GENH, so I'm curious..

Well, my guess would have to be somewhere between 0x50 and 0x70. The raw PCM files seem to have a fixed header size of 0x50 and they look the same in those first 0x50 bytes as the ADPCM files.

by vladik4kides at 4:41 PM EST on November 21, 2016

@Nisto, okay. It's just I didnt check this as I was always working with Wii U audios in genh, which required coeffs. Now the question is different - how can I play or decode this? I'm getting something close to the sound I need to get (I can hear the audio playing but there is a lot of noise also). I am using those settings (with 0000001f.rak in archive):



What settings are the best (the right ones) for this file? Thanks in advance.

by vladik4kides at 3:35 AM EST on November 23, 2016

Any help on this?

by mogikihei at 3:15 AM EST on November 25, 2016

Input File Format PCM RAW (Little Endian)
Header Skip 0x50 (0x30 seems to be the address of the start position)
Interleave 0x02
Channels 2
Frequency 48000

I played with this setting.

edited 3:29 AM EST November 25, 2016

by vladik4kides at 7:13 AM EST on November 25, 2016

@mogikihei
Thank you very much, this has worked! :D

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