• deframmentazione geometrica

    @oid Hi, thanks for answering, these are very useful informations to know before start to design a portable solution. But this is not my case since this project is designed to run on laptop\desktop computer.

    posted in technical issues read more
  • deframmentazione geometrica

    @whale-av Hi David, thanks for the suggestions.

    In order to satisfy all ENT parameters, the best option is to get the varying amplitude from [env~] and using [mod] to evenly spread the values.
    Image 6.png

    Here the test of a so generated 180.000 byte bin file, the results are within the normal required parameters.

    Entropy is 7.999070 bits per byte. This value is the information density of the contents of the file, expressed as a number of bits per byte. So the file is essentially random.

    The chi-square distribution is 84.08%. This test is the most commonly used test for the randomness of data calculated for the stream of bytes in the file and expressed as an absolute number and a percentage which indicates how frequently a truly random sequence would exceed the value calculated. If the percentages is between 10% and 90% the sequence is random.

    C:\Users\Lenovo\Desktop\ENT\random>ent -c 1.bin
    Value Char Occurrences Fraction
      0              683   0.003781
      1              730   0.004041
      2              731   0.004047
      3              717   0.003969
      4              705   0.003903
      5              717   0.003969
      6              720   0.003986
      7              709   0.003925
      8              707   0.003914
      9              696   0.003853
     10              703   0.003892
     11              685   0.003792
     12              713   0.003947
     13              707   0.003914
     14              674   0.003731
     15              708   0.003919
     16              653   0.003615
     17              700   0.003875
     18              699   0.003870
     19              685   0.003792
     20              720   0.003986
     21              710   0.003930
     22              733   0.004058
     23              722   0.003997
     24              647   0.003582
     25              691   0.003825
     26              656   0.003632
     27              699   0.003870
     28              677   0.003748
     29              674   0.003731
     30              696   0.003853
     31              700   0.003875
     32              672   0.003720
     33   !          693   0.003836
     34   "          727   0.004025
     35   #          744   0.004119
     36   $          769   0.004257
     37   %          735   0.004069
     38   &          663   0.003670
     39   '          715   0.003958
     40   (          680   0.003764
     41   )          712   0.003942
     42   *          713   0.003947
     43   +          692   0.003831
     44   ,          737   0.004080
     45   -          649   0.003593
     46   .          677   0.003748
     47   /          728   0.004030
     48   0          721   0.003991
     49   1          729   0.004036
     50   2          689   0.003814
     51   3          724   0.004008
     52   4          701   0.003881
     53   5          685   0.003792
     54   6          678   0.003753
     55   7          671   0.003715
     56   8          694   0.003842
     57   9          687   0.003803
     58   :          719   0.003980
     59   ;          764   0.004229
     60   <          736   0.004074
     61   =          688   0.003809
     62   >          699   0.003870
     63   ?          749   0.004146
     64   @          724   0.004008
     65   A          742   0.004108
     66   B          660   0.003654
     67   C          695   0.003847
     68   D          721   0.003991
     69   E          710   0.003930
     70   F          677   0.003748
     71   G          697   0.003859
     72   H          715   0.003958
     73   I          712   0.003942
     74   J          692   0.003831
     75   K          729   0.004036
     76   L          702   0.003886
     77   M          717   0.003969
     78   N          702   0.003886
     79   O          696   0.003853
     80   P          692   0.003831
     81   Q          753   0.004169
     82   R          729   0.004036
     83   S          726   0.004019
     84   T          742   0.004108
     85   U          687   0.003803
     86   V          689   0.003814
     87   W          652   0.003609
     88   X          700   0.003875
     89   Y          738   0.004085
     90   Z          683   0.003781
     91   [          700   0.003875
     92   \          703   0.003892
     93   ]          728   0.004030
     94   ^          735   0.004069
     95   _          711   0.003936
     96   `          724   0.004008
     97   a          742   0.004108
     98   b          690   0.003820
     99   c          723   0.004002
    100   d          705   0.003903
    101   e          703   0.003892
    102   f          706   0.003908
    103   g          735   0.004069
    104   h          693   0.003836
    105   i          719   0.003980
    106   j          711   0.003936
    107   k          650   0.003598
    108   l          724   0.004008
    109   m          712   0.003942
    110   n          669   0.003704
    111   o          697   0.003859
    112   p          729   0.004036
    113   q          661   0.003659
    114   r          666   0.003687
    115   s          740   0.004097
    116   t          742   0.004108
    117   u          710   0.003930
    118   v          685   0.003792
    119   w          758   0.004196
    120   x          669   0.003704
    121   y          701   0.003881
    122   z          720   0.003986
    123   {          694   0.003842
    124   |          725   0.004014
    125   }          658   0.003643
    126   ~          699   0.003870
    127              669   0.003704
    128              725   0.004014
    129              712   0.003942
    130              755   0.004180
    131              682   0.003775
    132              727   0.004025
    133              712   0.003942
    134              732   0.004052
    135              750   0.004152
    136              726   0.004019
    137              678   0.003753
    138              695   0.003847
    139              701   0.003881
    140              709   0.003925
    141              702   0.003886
    142              710   0.003930
    143              696   0.003853
    144              729   0.004036
    145              684   0.003787
    146              702   0.003886
    147              694   0.003842
    148              691   0.003825
    149              707   0.003914
    150              739   0.004091
    151              685   0.003792
    152              738   0.004085
    153              694   0.003842
    154              687   0.003803
    155              696   0.003853
    156              692   0.003831
    157              627   0.003471
    158              715   0.003958
    159              716   0.003964
    160              695   0.003847
    161   í          715   0.003958
    162   ó          697   0.003859
    163   ú          675   0.003737
    164   ñ          721   0.003991
    165   Ñ          724   0.004008
    166   ª          681   0.003770
    167   º          712   0.003942
    168   ¿          693   0.003836
    169   ®          696   0.003853
    170   ¬          708   0.003919
    171   ½          692   0.003831
    172   ¼          666   0.003687
    173   ¡          694   0.003842
    174   «          711   0.003936
    175   »          711   0.003936
    176   ░          747   0.004135
    177   ▒          685   0.003792
    178   ▓          702   0.003886
    179   │          709   0.003925
    180   ┤          684   0.003787
    181   Á          668   0.003698
    182   Â          750   0.004152
    183   À          683   0.003781
    184   ©          701   0.003881
    185   ╣          674   0.003731
    186   ║          661   0.003659
    187   ╗          696   0.003853
    188   ╝          700   0.003875
    189   ¢          720   0.003986
    190   ¥          681   0.003770
    191   ┐          742   0.004108
    192   └          681   0.003770
    193   ┴          697   0.003859
    194   ┬          757   0.004191
    195   ├          682   0.003775
    196   ─          715   0.003958
    197   ┼          711   0.003936
    198   ã          706   0.003908
    199   Ã          734   0.004063
    200   ╚          743   0.004113
    201   ╔          708   0.003919
    202   ╩          697   0.003859
    203   ╦          717   0.003969
    204   ╠          757   0.004191
    205   ═          690   0.003820
    206   ╬          684   0.003787
    207   ¤          718   0.003975
    208   ð          662   0.003665
    209   Ð          741   0.004102
    210   Ê          739   0.004091
    211   Ë          750   0.004152
    212   È          691   0.003825
    213   ı          695   0.003847
    214   Í          735   0.004069
    215   Î          698   0.003864
    216   Ï          690   0.003820
    217   ┘          718   0.003975
    218   ┌          721   0.003991
    219   █          693   0.003836
    220   ▄          696   0.003853
    221   ¦          690   0.003820
    222   Ì          716   0.003964
    223   ▀          723   0.004002
    224   Ó          719   0.003980
    225   ß          697   0.003859
    226   Ô          732   0.004052
    227   Ò          691   0.003825
    228   õ          733   0.004058
    229   Õ          752   0.004163
    230   µ          680   0.003764
    231   þ          701   0.003881
    232   Þ          746   0.004130
    233   Ú          729   0.004036
    234   Û          702   0.003886
    235   Ù          711   0.003936
    236   ý          694   0.003842
    237   Ý          661   0.003659
    238   ¯          741   0.004102
    239   ´          717   0.003969
    240   ­           757   0.004191
    241   ±          686   0.003798
    242   ‗          754   0.004174
    243   ¾          722   0.003997
    244   ¶          722   0.003997
    245   §          691   0.003825
    246   ÷          725   0.004014
    247   ¸          741   0.004102
    248   °          702   0.003886
    249   ¨          653   0.003615
    250   ·          695   0.003847
    251   ¹          711   0.003936
    252   ³          668   0.003698
    253   ²          700   0.003875
    254   ■          687   0.003803
    255              667   0.003692
    
    Total:        180639   1.000000
    
    Entropy = 7.999070 bits per byte.
    
    Optimum compression would reduce the size
    of this 180639 byte file by 0 percent.
    
    Chi square distribution for 180639 samples is 232.49, and randomly
    would exceed this value 84.08 percent of the times.
    
    Arithmetic mean value of data bytes is 127.6331 (127.5 = random).
    Monte Carlo value for Pi is 3.132000266 (error 0.31 percent).
    Serial correlation coefficient is -0.000969 (totally uncorrelated = 0.0).Insert Code Here
    

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  • deframmentazione geometrica

    Hi David, thanks for answering,
    I tested the entropy of the thermal noise with ENT and I found it's rather a week entropy source.

    The tested file is 100.000 byte, I used [snapshot~] to convert signals into values, and [binfile] to create a 256 character bin file.

    Image 3.png

    The result of entropy is 5,554712 bits per character, and optimum compression would reduce the size of this 100.000 byte file by 30 %. The file is considered to be essentially random when compression is 0%.
    As well as entropy all others values are out of parameters

    C:\Users\Lenovo\Desktop\ENT\random>ent -c 14.bin
    Value Char Occurrences Fraction
      0             1724   0.017240
      3             3507   0.035070
      7             3520   0.035200
     11             3559   0.035590
     15             3487   0.034870
     19             3361   0.033610
     23             3396   0.033960
     27             3353   0.033530
     31             3310   0.033100
     35   #         3321   0.033210
     38   &         3157   0.031570
     42   *         3235   0.032350
     46   .         3085   0.030850
     50   2         3069   0.030690
     54   6         2913   0.029130
     58   :         2750   0.027500
     62   >         2753   0.027530
     66   B         2707   0.027070
     70   F         2456   0.024560
     73   I         2504   0.025040
     77   M         2384   0.023840
     81   Q         2326   0.023260
     85   U         2181   0.021810
     89   Y         2140   0.021400
     93   ]         2001   0.020010
     97   a         1921   0.019210
    101   e         1762   0.017620
    105   i         1643   0.016430
    108   l         1642   0.016420
    112   p         1537   0.015370
    116   t         1444   0.014440
    120   x         1397   0.013970
    124   |         1266   0.012660
    128             1188   0.011880
    132             1115   0.011150
    136              996   0.009960
    140              984   0.009840
    143              909   0.009090
    147              774   0.007740
    151              842   0.008420
    155              769   0.007690
    159              642   0.006420
    163   ú          626   0.006260
    167   º          567   0.005670
    171   ½          533   0.005330
    175   »          508   0.005080
    178   ▓          426   0.004260
    182   Â          406   0.004060
    186   ║          375   0.003750
    190   ¥          352   0.003520
    194   ┬          320   0.003200
    198   ã          314   0.003140
    202   ╩          292   0.002920
    206   ╬          228   0.002280
    210   Ê          212   0.002120
    214   Í          201   0.002010
    217   ┘          186   0.001860
    221   ¦          157   0.001570
    225   ß          123   0.001230
    229   Õ          128   0.001280
    233   Ú          110   0.001100
    237   Ý          105   0.001050
    241   ±           95   0.000950
    245   §           74   0.000740
    249   ¨           79   0.000790
    252   ³           68   0.000680
    255              485   0.004850
    
    Total:        100000   1.000000
    
    Entropy = 5.554712 bits per byte.
    
    Optimum compression would reduce the size
    of this 100000 byte file by 30 percent.
    
    Chi square distribution for 100000 samples is 530303.93, and randomly
    would exceed this value less than 0.01 percent of the times.
    
    Arithmetic mean value of data bytes is 69.9192 (127.5 = random).
    Monte Carlo value for Pi is 3.924156966 (error 24.91 percent).
    Serial correlation coefficient is 0.042567 (totally uncorrelated = 0.0).
    

    Even though ADC thermal noise is a week entropy source it's still true random as well as vhf and uhf signals. Some post-processing might be able to reshape the statistical characteristics of the data.

    Thanks,
    Matteo

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  • deframmentazione geometrica

    Hi guys,

    I have a question about the nature of noise outputted by [adc~], even though no microphone or other input device are connected to it.
    Image 2.png

    Internally, all ADC circuits produce a certain amount of rms noise which is mostly determined by three different contributors: quantization, thermal noise and clock jitter.

    Since quantization and clock jitter are data converter noise and no external input has to be processed, I suppose this is solely determinated by the internal thermal noise due the physical movement of charge inside electrical conductors in the adc.

    Can someone confirm or invalid this thesis?
    Thanks,
    Matteo

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  • deframmentazione geometrica

    Hi guys,

    I'm trying to vocalize a whisper speech using fft convolution; starting from two distinct inputs <a sampled vocal and a whisper speech> I have seen that is possible to generate a sort of vocal/normal speech.

    I wonder if is there a way to improve the quality of the convolution process so that the result will sound more similar to the input vocal timbre than it is now.

    Thanks in advance.
    wts.zip

    posted in technical issues read more
  • deframmentazione geometrica

    @whale-av [adc~] gives some noise even without microphone, that noise is enough if moltiplied in amplitude, you don't need more volume, the limiter stabilize the incoming signal whatever the mic setting in your system.
    I din't realize it was for an android app, I posted here because is based on your configuration.
    What does this have to do with the old thread about [seed(?
    Thanks

    posted in technical issues read more
  • deframmentazione geometrica

    @whale-av What if the array is filled by "true noise" from adc?
    -setting a threshold of the incoming signal with a limiter so that microphone volume is irrilevant;
    -combine the table data and a saw-tooth wave in fm synthesis to generate both complexity and uniform distribution.
    Can this be considered true random?
    Thanks
    fm random.pd

    posted in technical issues read more
  • deframmentazione geometrica

    @myQwil; @jancsika I did other tests, as you suggested the behavior is actually due by the number of objects and the sequence of patching, the priority given to linking objects is decisive. Thanks

    posted in technical issues read more

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