.WV6 audio by sandmanfan98 at 5:26 AM EDT on May 4, 2018
I'm trying to convert .WV6 audio files. It's IMA ADPCM COMPRESSED 16 BIT AUDIO when I put it in a hex editor. I made threads about this on zenHAX and XeNTaX but haven't gotten replies. No idea if it's completely foreign or a really simple format and I'm just plain stupid. Would really appreciate if someone would please help me with this.

Samples here are from Fairly OddParents Breakin' Da Rules.
by simonmkwii at 8:07 AM EDT on May 4, 2018
It's just standard 4-bit IMA-ADPCM at 44100Hz, mono, and 0x88 interleave.
by sandmanfan98 at 5:33 PM EDT on May 4, 2018
Alright I did that, but it isn't as clear as it plays in the game. The created genhs sound static-like and a little distorted. It plays at the right frequency, just sounds low-quality.

edited 5:43 PM EDT May 4, 2018
by bnnm at 1:14 PM EDT on May 5, 2018
I don't think it's pure IMA but a minor variation; I get cleaner sound with some tweaks but still not perfect. Post the .exe/sound dlls, could help.
by sandmanfan98 at 12:38 AM EDT on May 6, 2018
Couldn't find any sound related .dlls but here's the game exe
by sandmanfan98 at 7:01 AM EDT on May 28, 2018
Sorry for the bump, but I now have cleaner sound by selecting Interleaved DVI 4-Bit IMA ADPCM. However there's an annoying pop at the start and end of each audio clip. Is there a way to fix this besides trimming each one?
by hcs at 9:14 PM EDT on May 28, 2018
Probably it has an initial history/index set that isn't being loaded.

edited 9:15 PM EDT May 28, 2018
by bnnm at 4:42 PM EDT on May 29, 2018
If you open your wav with Audacious you'll see the waveform is distorted, hence it will pop. AFAIK it's not pure DVI/IMA.

Didn't see hist/index in the header but I don't think it would fix a waveform that bad.

I get a good waveform using a alternate nibble expand model, but there is still some deviation, and I don't know enough about ADPCM to guess why.
Basically: ((nibble * 2) * step) / 8 rather than ((nibble * 2 + 1) * step) / 8 (IIRC also improved a few other games, could be a common model).

IOW there is nothing you can do.
by hcs at 8:16 PM EDT on May 29, 2018
Ah ok, different rounding model also makes sense.
by bnnm at 5:12 PM EDT on August 4, 2018
I finally added this to vgmstream, after analyzing the .exe with IDA, should sound correctly.
It was using: sample = hist + sign*((u_nibble*step) / 8) + ((u_nibble*step) / 4)

I wonder why everybody loves to do their own IMAs?

Go to Page 0

Search this thread

Show all threads

Reply to this thread:

User Name Tags:

bold: [b]bold[/b]
italics: [i]italics[/i]
emphasis: [em]emphasis[/em]
underline: [u]underline[/u]
small: [small]small[/small]
Link: [url=http://www.google.com]Link[/url]


HCS Forum Index
Halley's Comet Software
forum source
Generated in 0.0028s;