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library:audio:rolldown

滚降

x = 0.5 : 31.5
y = cos((pi/2) * f /32 ) .^ 2
plot(y)

y8 = round(y * 255)
%  255   254   251   248   243   237   230   222
%  213   203   193   182   170   158   146   134   
%  121   109    97    85    73    62    52    42    
%  33    25     18    12     7     4     1     0

library/audio/rolldown.txt · Last modified: 2022/05/02 00:32 (external edit)