[Coladam] More about tone channels attenuation (volume) -and- digital sounds

Daniel Bienvenu newcoleco at yahoo.fr
Thu Dec 10 21:24:51 CET 2009


Well, after more calculations, the only way I've find out to eliminate the glitches that cause the clearly audible periodic noise in the background, is to reduce the combinations by eliminating the "not wanted" ones that cause these glitches.

The best compromise is using 46 values as follow :

F F F -> 0,000000000000000
E F F -> 0,013270239018450
E E F -> 0,026540478036900
E E E -> 0,039810717055350
D E E -> 0,043246719157809
D D E -> 0,046682721260268
D D D -> 0,050118723362727
C D D -> 0,054444393724491
C C D -> 0,058770064086255
C C C -> 0,063095734448019
B C C -> 0,068541430789489
B B C -> 0,073987127130959
B B B -> 0,079432823472428
A B B -> 0,086288548981619
A A B -> 0,093144274490809
A A A -> 0,100000000000000
9 A A -> 0,108630847059806
9 9 A -> 0,117261694119611
9 9 9 -> 0,125892541179417
8 9 9 -> 0,136758133868315
8 8 9 -> 0,147623726557213
8 8 8 -> 0,158489319246111
7 8 8 -> 0,172168289996370
7 7 8 -> 0,185847260746629
7 7 7 -> 0,199526231496888
6 7 7 -> 0,216747035381578
6 6 7 -> 0,233967839266268
6 6 6 -> 0,251188643150958
5 6 6 -> 0,272868350772918
5 5 6 -> 0,294548058394878
5 5 5 -> 0,316227766016838
4 5 5 -> 0,343520900862391
4 4 5 -> 0,370814035707944
4 4 4 -> 0,398107170553497
3 4 4 -> 0,432467191578089
3 3 4 -> 0,466827212602681
3 3 3 -> 0,501187233627272
2 3 3 -> 0,544443937244913
2 2 3 -> 0,587700640862553
2 2 2 -> 0,630957344480193
1 2 2 -> 0,685414307894889
1 1 2 -> 0,739871271309585
1 1 1 -> 0,794328234724282
0 1 1 -> 0,862885489816188
0 0 1 -> 0,931442744908094
0 0 0 -> 1,000000000000000

It's not well distributed but the noisy glitches are no more an issue. A first test confirm this.

So, now, the next step is encoding into nibbles instead of 5 or 6 bits vlues.

Have a nice day!

Daniel 



      


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