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             !Spectre+ v1.06 (Mar 1991)
             Warner H.Hepping 1990, 1991.
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Spectre+ is Public Domain Software but you're
NOT allowed to sell Spectre+ as part of a Public-
Domain-deal without prior written approval from ME!
(As someone did with Spectre!: Shame on you, you
thief!)

Spectre+ is not to be included in ANY program or part
of ANY program! If you'd like to use Spectre+ as part
of a program or package-deal contact the author at the 
address at the bottom of this file!!

Furthermore, ALL files contained in the !Spectre+-
directory should be present with Spectre+ at all times!
None of these files will be changed without MY written
approval!

(I really don't like this kind of talk, but it seems to
be necassary!)

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Spectre+ does a rough, but fast power spectrum
estimation in a window.
The analysis is performed using a highly
optimised Fast Fourier Transformation over 
128 points. After that, a two-sided power 
estimation is performed jusing two values
at a time.

The display shows, from left to right, the
amplitude of 64 frequency-bands. The frequency
of each band increases in a linear way from left
to right.

Because the analysis is small, 'leakage' 
causes amplitude-values to leak into adjacent
bins! (v1.06 has improved leakage-suppression!) 

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Added features from v1.03 in v1.04:

  -Gravity added.
  -Direct Sprite Access to speed up drawing.
  -Fast Sqrt.
  -Approx. 70% faster than v1.03!!

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Added features in v1.05 from v1.04:

  -Throughput approx. 10% improved!! 

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Renamed 'Spectre+' at March 18, 1991 because of 
a number of reasons, wich I won't be bothering
you with.
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Added features in v1.05 'Spectre+' from v1.05 'Spectre':

  -Number of points doubled (Now 128).
  -Pause added (SELECT on work area).
  -Speed decreased by 12% (Working on that!).
  -Mean throughput: 24Fps (Arm2 without MEMC1a)!

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Added features in v1.06 from v1.05+:

  -Speed increased by 25%!
  -Gravity=99 now means no peaks! 
  -Mean throughput: 30Fps (Arm2 without MEMC1a)!
   (TrackerVoice playing 4-voice song).

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NB:
If Spectre+ seems to be wrong, click Adjust in its
window to make it update its idea of the Sound-DMA!

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|    All research and coding in assembler by    |
|              Warner.H.Hepping                 |
|               Kochstraat 128                  |
|              9728 KH Groningen                |
|               The Netherlands                 |
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      Just check it out with TrackerVoice.
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