name:   AF8, AF16 (AudioFerence8, AudioFerence16)
author: Michael Kübel (michael.kuebel@gmx.de)
size:   1010/965 bytes
needs:  Risc PC, StrongARM recommended (...because of precalculation time),
        AF8 -> 8 bit sound system, AF16 -> 16 bit sound card
descr.: audio animated interference effects   

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Usage:
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1) Start any Tracker-Player Application with your favourite song...

2) - Double click on 'AF8' if you've got a 8 bit sound system
   - Double click on 'AF16' if you've got a 16 bit sound card

3) Wait about 6 seconds (StrongARM), precalculation time 

4) The animation starts when there's some action on the sound system
   (Some stable rings mean just silence...) 

   - Use some keys to interact:

   'Space'  switches through up to the 8 possible voices of the sound system
            (AF8 only !, AF16 uses only one voice (mix of left & right))
           
   'Return' switch through 4 different interference-like effects
   
   'Tab'    switch between 2 palette effects (1st is more stable,
            2nd calculates the palette depending on the sample values
            and gives more flashy and darker results)
             
4) Hit 'Escape' to quit

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This is my first entry for a competition like this, and I appreciate for all
the help from Pervect of Topix and the people on the Codecraft mailing list.

Some Credits:

- Pervect...........for the really nice !Squasher App and letting me use his
                    'memory-block-address-finding' - code :-)  
- Exoticorn.........for some hints and having a nice time at MS2k
- Denys Bogatz......initial code to get the sound system infos 
- Dirk Krumbholz....optimizing the sound system info code
- Mr.Hill...........for his nice Basic-Interference-Routine, from where the
                    idea for my code came from.
- Andre Timmermans..for testing and correcting the 16bit version 

If you want to have some more sound visualisation applications then have a
look at my other productions at Andre Timmermans '!DigitalCD'-Web-site:

   *** http://www.geocities.com/SiliconValley/Horizon/4471/ ***

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P.S.: If you want to play a little bit with the code, just try altering
      the following value '2' in the source and recompile it:

      .Constant_Circles%
      EQUFS 2

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