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Dreamcast BIOS - IMA ADPCM

ZenHAX
in Zenhax

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AnonBaiter, posted Tue Sep 06, 2016 3:35 pm (17277)

So I managed to find this piece of audio around the BIOS:
https://www.sendspace.com/file/ubab40

The problem is how to decode it. I tried to convert the thing into GENH with the following settings(using vgmtoolbox of course):
4-bit IMA ADPCM
Header Skip: 0
Channels: 2
Sample Rate: 44100
Interleave: 0x1000

Yet the output doesn't sound too good. Does anyone here know how to decode this beast?

EDIT: Also found this from the Dreamcast development BIOS: https://www.sendspace.com/file/oqbfxi
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AnonBaiter, posted Tue Sep 06, 2016 9:07 pm (17286)

Actually, the codec used was Yamaha AICA ADPCM. The output is still rough, but it's as close as it gets.
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AnonBaiter, posted Wed Sep 07, 2016 11:58 pm (17341)

Never mind, problem solved.
And by "solved", I mean "split one file into two and see if these files were actually one channel each".
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