Re: Creative ADPCM?

Mike Melanson wrote:

>     I do not know all the details yet but I believe the LucasArts 
> animation format supports an ADPCM format that compresses to a variable 
> number of bits, from 2-5 bits / sample. I think it adjusts throughout 
> the encoding but I need to go back and look at it some more.

Let me know what you find as I'm always in the market for an 8-bit audio 
compression technique that has low decoding requirements, such as:

- John Ratcliff's ACOMP (variable bit-depth per frame ADPCM)
- Michael J. Mahon's 4-bit ADPCM adapted for 8-bit input (uses regular DVI 
values table but ends at the last value below 127)
- 8svx fibonacci deltas (good for voice, bad for music)
- Dumb raw convert from 8-bit to 6-bit (RealSound did this)

I'd love to add Creative's methods to this list, and any others you know of!
-- 
Jim Leonard ([email protected])                    http://www.oldskool.org/
Want to help an ambitious games project?             http://www.mobygames.com/
Or check out some trippy MindCandy at             http://www.mindcandydvd.com/


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