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FMOD's FADPCM decoding

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FMOD's FADPCM decoding

Post by bnnm » Thu Nov 23, 2017 7:35 pm

FMOD introduced a new ADPCM codec in ~2015 for FSB5 they call FADPCM. On a quick glance it looks somewhat like MS-ADPCM.

While this can be converted to WAV using daemon1's tools + FMOD's DLLs I was hoping somebody could figure out the decoding algorithm so it could be implemented into other players (namely vgmstream).

It's used in some PC games like Dead Rising 4 and Forza Horizon 3. Here are some samples:!GNRlHSra!S7cTB3rlcefY ... NmT8m3JH7Q

EDIT: vgmstream now decodes this

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