GEN2 vs GEN10
| Date | 2017-03-01 20:06 |
| From | Menno Knevel |
| Subject | GEN2 vs GEN10 |
Hi,
i am trying to generate some random with seed values for GEN10, but things
happen out of my control it seems...
iseed = 100
;
irnd1 rnd31 0.5, 0 , iseed
irnd1 += 0.5
irnd2 rnd31 0.5, 0 , iseed + 1
irnd2 += 0.5
irnd3 rnd31 0.5, 0 , iseed + 2
irnd3 += 0.5
irnd4 rnd31 0.5, 0 , iseed + 3
irnd4 += 0.5
irnd5 rnd31 0.5, 0 , iseed + 4
irnd5 += 0.5
irnd6 rnd31 0.5, 0 , iseed + 5
irnd6 += 0.5
irnd7 rnd31 0.5, 0 , iseed + 6
irnd7 += 0.5
irnd8 rnd31 0.5, 0 , iseed + 7
irnd8 += 0.5
irnd9 rnd31 0.5, 0 , iseed + 8
irnd9 += 0.5
irnd10 rnd31 0.5, 0 , iseed + 9
irnd10 += 0.5
print irnd1
print irnd2
print irnd3
print irnd4
print irnd5
print irnd6
print irnd7
print irnd8
print irnd9
print irnd10
girnd1 ftgen 50, 0, 16, 2, irnd1, irnd2, irnd3, irnd4, irnd5, irnd6,
irnd7, irnd8, irnd9, irnd10
prints "%nContent of Function Table:%n"
indx init 0
loop:
ival table indx, girnd1
prints "Index %d = %f%n", indx, ival
loop_lt indx, 1, ftlen(girnd1), loop
ftgen 50 prints out (more or less) the right values when i use GEN2 - not so
with GEN10:
GEN2:
Content of Function Table:
Index 0 = 0.659629
Index 1 = 0.372027
Index 2 = 0.084426
Index 3 = 0.973615
Index 4 = 0.686014
Index 5 = 0.398413
Index 6 = 0.110811
Index 7 = 1.000000
Index 8 = 0.712399
Index 9 = 0.424798
Index 10 = 0.000000
Index 11 = 0.000000
Index 12 = 0.000000
Index 13 = 0.000000
Index 14 = 0.000000
Index 15 = 0.000000
GEN10:
Content of Function Table:
Index 0 = 0.000000
Index 1 = 1.000000
Index 2 = 0.443048
Index 3 = -0.497135
Index 4 = 0.954292
Index 5 = 0.249995
Index 6 = 0.034843
Index 7 = -0.247956
Index 8 = 0.000000
Index 9 = 0.247956
Index 10 = -0.034843
Index 11 = -0.249995
Index 12 = -0.954292
Index 13 = 0.497135
Index 14 = -0.443048
Index 15 = -1.000000
Why are the index values so different in GEN10?
--
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| Date | 2017-03-01 20:23 |
| From | jpff |
| Subject | Re: GEN2 vs GEN10 |
Sorry I do not follow. GEN10 sums weighted sinusoids; your code does not
mention gen10 either?
Confused of Bath
On Wed, 1 Mar 2017, Menno Knevel wrote:
> Hi,
> i am trying to generate some random with seed values for GEN10, but things
> happen out of my control it seems...
>
> iseed = 100
> ;
> irnd1 rnd31 0.5, 0 , iseed
> irnd1 += 0.5
> irnd2 rnd31 0.5, 0 , iseed + 1
> irnd2 += 0.5
> irnd3 rnd31 0.5, 0 , iseed + 2
> irnd3 += 0.5
> irnd4 rnd31 0.5, 0 , iseed + 3
> irnd4 += 0.5
> irnd5 rnd31 0.5, 0 , iseed + 4
> irnd5 += 0.5
> irnd6 rnd31 0.5, 0 , iseed + 5
> irnd6 += 0.5
> irnd7 rnd31 0.5, 0 , iseed + 6
> irnd7 += 0.5
> irnd8 rnd31 0.5, 0 , iseed + 7
> irnd8 += 0.5
> irnd9 rnd31 0.5, 0 , iseed + 8
> irnd9 += 0.5
> irnd10 rnd31 0.5, 0 , iseed + 9
> irnd10 += 0.5
> print irnd1
> print irnd2
> print irnd3
> print irnd4
> print irnd5
> print irnd6
> print irnd7
> print irnd8
> print irnd9
> print irnd10
> girnd1 ftgen 50, 0, 16, 2, irnd1, irnd2, irnd3, irnd4, irnd5, irnd6,
> irnd7, irnd8, irnd9, irnd10
> prints "%nContent of Function Table:%n"
> indx init 0
> loop:
> ival table indx, girnd1
> prints "Index %d = %f%n", indx, ival
> loop_lt indx, 1, ftlen(girnd1), loop
>
> ftgen 50 prints out (more or less) the right values when i use GEN2 - not so
> with GEN10:
>
> GEN2:
> Content of Function Table:
> Index 0 = 0.659629
> Index 1 = 0.372027
> Index 2 = 0.084426
> Index 3 = 0.973615
> Index 4 = 0.686014
> Index 5 = 0.398413
> Index 6 = 0.110811
> Index 7 = 1.000000
> Index 8 = 0.712399
> Index 9 = 0.424798
> Index 10 = 0.000000
> Index 11 = 0.000000
> Index 12 = 0.000000
> Index 13 = 0.000000
> Index 14 = 0.000000
> Index 15 = 0.000000
>
> GEN10:
> Content of Function Table:
> Index 0 = 0.000000
> Index 1 = 1.000000
> Index 2 = 0.443048
> Index 3 = -0.497135
> Index 4 = 0.954292
> Index 5 = 0.249995
> Index 6 = 0.034843
> Index 7 = -0.247956
> Index 8 = 0.000000
> Index 9 = 0.247956
> Index 10 = -0.034843
> Index 11 = -0.249995
> Index 12 = -0.954292
> Index 13 = 0.497135
> Index 14 = -0.443048
> Index 15 = -1.000000
>
> Why are the index values so different in GEN10?
>
>
>
> --
> View this message in context: http://csound.1045644.n5.nabble.com/GEN2-vs-GEN10-tp5754876.html
> Sent from the Csound - General mailing list archive at Nabble.com.
>
> Csound mailing list
> Csound@listserv.heanet.ie
> https://listserv.heanet.ie/cgi-bin/wa?A0=CSOUND
> Send bugs reports to
> https://github.com/csound/csound/issues
> Discussions of bugs and features can be posted here
>
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| Date | 2017-03-02 19:21 |
| From | Menno Knevel |
| Subject | Re: GEN2 vs GEN10 |
i'm confused too, but presume this is because of a lack of knowledge from my
part :)
Still i like to understand so i can move on...
i have simplified the example somewhat so that 8 rnd31 with different seeds
generate 8 different values:
instr 1: irnd1 = 0.605
instr 1: irnd2 = 0.361
instr 1: irnd3 = 0.117
instr 1: irnd4 = 0.872
instr 1: irnd5 = 0.605
instr 1: irnd6 = 0.361
instr 1: irnd7 = 0.117
instr 1: irnd8 = 0.872
ftable 50:
When i use GEN2, without normalization, the values are put in correct:
girnd1 ftgen 50, 0, 8, -2, irnd1, irnd2, irnd3, irnd4, irnd5, irnd6,
irnd7, irnd8
Content of Function Table:
Index 0 = 0.605322
Index 1 = 0.360928
Index 2 = 0.116533
Index 3 = 0.872138
Index 4 = 0.605322
Index 5 = 0.360928
Index 6 = 0.116533
Index 7 = 0.872138
But
when i use GEN10, without normalization, i get:
girnd1 ftgen 50, 0, 8, -10, irnd1, irnd2, irnd3, irnd4, irnd5,
irnd6, irnd7, irnd8
Content of Function Table:
Index 0 = 0.000000
Index 1 = 0.428027
Index 2 = 1.582901
Index 3 = 0.428027
Index 4 = 0.000000
Index 5 = -0.428027
Index 6 = -1.582901
Index 7 = -0.428027
What is happening here? Why are the random-with-seed values not used as a
one-to-one copy in GEN10?
Or does it have to do with the way the values are printed?
Goal is to generate random-with-seeds values for GEN10 at i-rate, where the
random values stand for the harmonics amplitude.
--
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| Date | 2017-03-02 21:27 |
| From | Justin Smith |
| Subject | Re: GEN2 vs GEN10 |
" Why are the random-with-seed values not used as a one-to-one copy in GEN10?" I must be missing something here, because the args to gen 10 are the strengths of harmonics, and the values in the table look like perfectly reasonable results if the harmonics had those respective amplitudes On Thu, Mar 2, 2017 at 11:21 AM Menno Knevel <magknevel@gmail.com> wrote: i'm confused too, but presume this is because of a lack of knowledge from my |
| Date | 2017-03-03 11:11 |
| From | Menno Knevel |
| Subject | Re: GEN2 vs GEN10 |
no, i was clearly missing something, but by asking the question alone i now
understand.
I was confused about the i-rate concept.
When the tables get their p values from rnd31 and then the Gen is read back
to be displayed by:
ival table indx, girnd1
prints "Index %d = %f%n", indx, ival
loop_lt indx, 1, ftlen(girnd1), loop
the calculation by the Gen has finished and read back. Of course, this takes
some time to calculate, although the instrument calculates with a score
like: i1 0 0 - p3 is zero seconds long, while the calculation surely must
take some time to calculate. This "contradiction in time" is now no longer a
contradiction for me because the i-rate values are just getting ready to be
used - but still they are i- rate values.
:)
--
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