Hi Juergen
Below you can find the plot of the analysis, I highlighted in red the most significative ones, keeping a compensation of about 6dB from 1752 and 3309 Hz which should equal the filters' slope in the expression circuit ( the sample was taken by bending down a master sine with the ribbon to 4Hz and the ringmod sine at full speed which ,because of a bad calibration didn't go any upper than 194Hz ) . I didn't do a magnitude analysis and I don't know how to calculate the phases in degrees ( Autosignal reports it's calculated with the equation Pi/2+atan(Im/Re) ) , is there a way to convert the phases resulting in the plot in simple degrees ?
Max
Fourier Frequency Spectrum
Data: C:\Documenti\cs80testRM-ribbon.wav
X: Time
Y: Signal
Data Source: c:\documenti\cs80testrm-ribbon.wav
Date: Jan 15, 2006
Algorithm: Best Exact N
Data Size: 2719
FFT Size: 2719 (2719)
SSA Power: 41.992159
MSA Power: 0.015443972
TISA Power: 0.00095220314
Signal Count: 30
Interpolated Spectral Peaks
Frequency dB Norm
14.877906139 -19.97541122
81.390546776 -40.77780049
194.70764656 0.0016732763 0*F
348.40282297 -53.82812629
389.32102296 -37.15697725 (1.39%) 1,999 "
464.83167283 -56.00814691
504.08549473 -54.99147860
584.98267909 -45.49839886 (0.53%) 3.004 "
676.32285349 -57.07524863
716.70463159 -58.14487508
788.17858727 -57.13301096
891.84985290 -61.34868218
973.55513100 -36.61476974 (1.48%) 5.008 "
1068.7298817 -62.72524376
1103.3021177 -61.28122667
1132.0340551 -65.07024039
1168.0373181 -54.02129084 (0.2%) 5.998 "
1206.0933833 -64.56027399
1279.4150496 -65.81731797
1362.5185053 -49.90757754 (0.32%) 6.997 "
1489.9534137 -65.66384177
1557.7755134 -61.16811813
1752.2281151 -40.38084240 (0.96%) 8.999 "
1958.4957794 -62.23484786
2531.7123920 -45.75354476 (0.52%) 13.002 "
2724.6604339 -63.06084369
2922.5050163 -62.72369328
3114.5591760 -61.24236918
3309.3039856 -59.05522648 (0.11%) 16.996 "
3699.5260010 -61.05652970
Frequency Analysis
Frequency Amplitude Phase Power % Rel %
14.8779061 0.01597737 0.36676881 7.8696e-06 0.95197464 0.96170777
81.3905468 0.00149306 5.94038201 6.8722e-08 0.00831327 0.00839827
194.707647 0.16292348 1.52033658 0.00081829 98.9879329 100.000000
348.402823 0.00036609 6.71551988 4.1317e-09 0.00049981 0.00050492
389.321023 0.00225973 4.65599210 1.5742e-07 0.01904261 0.01923730
464.831673 0.00024936 5.84464504 1.9169e-09 0.00023188 0.00023426
504.085495 0.00028628 6.10448143 2.5265e-09 0.00030563 0.00030876
584.982679 0.00084755 0.98694926 2.2145e-08 0.00267885 0.00270624
676.322853 0.00017329 4.61570213 9.2578e-10 0.00011199 0.00011314
716.704632 0.00016438 6.39568356 8.3299e-10 0.00010077 0.00010180
788.178587 0.00022053 1.57702631 1.4993e-09 0.00018137 0.00018322
891.849853 0.00013942 6.13337956 5.9926e-10 7.2492e-05 7.3233e-05
973.555131 0.00239668 4.01345544 1.7708e-07 0.02142076 0.02163977
1068.72988 0.00011829 6.35430309 4.3135e-10 5.218e-05 5.2713e-05
1103.30212 0.00014041 6.20342219 6.0773e-10 7.3516e-05 7.4268e-05
1132.03406 9.2467e-05 0.42567406 2.6358e-10 3.1885e-05 3.2211e-05
1168.03732 0.00032312 0.58460091 3.2186e-09 0.00038935 0.00039333
1206.09338 9.9895e-05 5.79633607 3.0763e-10 3.7214e-05 3.7594e-05
1279.41505 8.3211e-05 6.07355313 2.1345e-10 2.5821e-05 2.6085e-05
1362.51851 0.00052036 0.47837042 8.3475e-09 0.00100979 0.00102011
1489.95341 8.4612e-05 6.41358536 2.207e-10 2.6698e-05 2.6971e-05
1557.77551 0.00014048 0.10738512 6.084e-10 7.3598e-05 7.4351e-05
1752.22812 0.00107871 0.19526114 3.5872e-08 0.00433935 0.00438371
1958.49578 0.00012238 5.89392026 4.6172e-10 5.5854e-05 5.6425e-05
2531.71239 0.00041718 2.92095178 5.3652e-09 0.00064903 0.00065566
2724.66043 0.00011446 6.12903208 4.0387e-10 4.8856e-05 4.9355e-05
2922.50502 0.00011352 2.37026197 3.9724e-10 4.8054e-05 4.8546e-05
3114.55918 0.00014097 5.66156617 6.1264e-10 7.411e-05 7.4868e-05
3309.30399 0.00018152 5.18187246 1.0157e-09 0.00012287 0.00012413
3699.52600 0.00014163 4.82550669 6.1839e-10 7.4806e-05 7.5571e-05
0.00082666 100.000000
Sine Component Fit (Suboptimal)
Frequency Amplitude Phase Power % Rel %
14.8779061 0.01616117 0.86892327 8.2905e-06 0.99757892 1.00989484
81.3905468 0.00101031 6.01142844 3.1362e-08 0.00377377 0.00382036
194.707647 0.16321340 1.50452222 0.00082093 98.7804754 100.000000
348.402823 0.00515320 3.16436752 8.1936e-07 0.09859175 0.09980894
389.321023 0.00261330 4.60579785 2.1041e-07 0.02531842 0.02563099
464.831673 0.00265897 2.64538222 2.169e-07 0.02609954 0.02642176
504.085495 0.00107682 4.65244395 3.5805e-08 0.00430835 0.00436154
584.982679 0.00049704 0.23525228 7.6053e-09 0.00091513 0.00092642
676.322853 0.00167434 2.49855735 8.6092e-08 0.01035930 0.01048720
716.704632 0.00115641 4.20526008 4.1341e-08 0.00497444 0.00503585
788.178587 0.00168481 2.78457089 8.7344e-08 0.01050993 0.01063968
891.849853 0.00013451 5.61542328 5.5756e-10 6.7091e-05 6.7919e-05
973.555131 0.00254305 3.95781425 1.9929e-07 0.02398054 0.02427660
1068.72988 0.00033775 1.85138062 3.5094e-09 0.00042228 0.00042749
1103.30212 0.00011952 5.64340425 4.4023e-10 5.2972e-05 5.3626e-05
1132.03406 0.00064445 2.26500019 1.277e-08 0.00153656 0.00155553
1168.03732 0.00026307 0.47329760 2.1328e-09 0.00025664 0.00025981
1206.09338 0.00095587 3.69129444 2.8208e-08 0.00339423 0.00343614
1279.41505 0.00022014 1.85105366 1.4911e-09 0.00017942 0.00018164
1362.51851 0.00046434 0.30700853 6.6461e-09 0.00079971 0.00080959
1489.95341 0.00029136 1.94393101 2.6123e-09 0.00031433 0.00031821
1557.77551 0.00020148 5.27178928 1.251e-09 0.00015053 0.00015239
1752.22812 0.00105923 6.25664977 3.4577e-08 0.00416056 0.00421193
1958.49578 0.00040491 2.13978641 5.0474e-09 0.00060735 0.00061485
2531.71239 0.00037591 2.80820893 4.3536e-09 0.00052386 0.00053033
2724.66043 9.7185e-05 6.14565613 2.9115e-10 3.5033e-05 3.5466e-05
2922.50502 0.00016001 3.82074057 7.8926e-10 9.497e-05 9.6143e-05
3114.55918 0.00016870 5.33671571 8.7696e-10 0.00010552 0.00010683
3309.30399 0.00022872 4.95270467 1.6118e-09 0.00019395 0.00019634
3699.52600 0.00024331 4.82803529 1.8244e-09 0.00021953 0.00022224
0.00083106 100.000000
r2 DOF r2 Std Err F-stat
0.8696266696 0.8651618295 0.0456251418 197.03558594
Data Power Model Power Error Power Ratio
0.0009518570 0.0008281064 0.0001240968 6.6730699680
Sine Component 1
Parm Value Std Error t-value 95% Confidence Limits P>|t|
Ampl 0.01616117 0.00123141 13.1241097 0.01374654 0.01857581 0.00000
Freq 14.8779061 0.74367653 20.0058837 13.4196556 16.3361567 0.00000
Phase 0.86892327 0.18396113 4.72340685 0.50820000 1.22964653 0.00000
Sine Component 2
Parm Value Std Error t-value 95% Confidence Limits P>|t|
Ampl 0.00101031 0.00126074 0.80136252 -0.0014618 0.00348244 0.42299
Freq 81.3905468 11.0319905 7.37768466 59.7582836 103.022810 0.00000
Phase 6.01142844 2.44687575 2.45677715 1.21343116 10.8094257 0.01408
Sine Component 3
Parm Value Std Error t-value 95% Confidence Limits P>|t|
Ampl 0.16321340 0.00124554 131.038282 0.16077106 0.16565573 0.00000
Freq 194.707647 0.06890465 2825.75495 194.572534 194.842759 0.00000
Phase 1.50452222 0.01539026 97.7580884 1.47434397 1.53470046 0.00000
Sine Component 4
Parm Value Std Error t-value 95% Confidence Limits P>|t|
Ampl 0.00515320 0.00125296 4.11283801 0.00269632 0.00761008 0.00004
Freq 348.402823 2.39029360 145.757334 343.715776 353.089870 0.00000
Phase 3.16436752 0.52220350 6.05964436 2.14039603 4.18833900 0.00000
Sine Component 5
Parm Value Std Error t-value 95% Confidence Limits P>|t|
Ampl 0.00261330 0.00125877 2.07608215 0.00014503 0.00508158 0.03798
Freq 389.321023 4.74808577 81.9953643 380.010659 398.631386 0.00000
Phase 4.60579785 1.03785350 4.43781115 2.57070543 6.64089027 0.00001
Sine Component 6
Parm Value Std Error t-value 95% Confidence Limits P>|t|
Ampl 0.00265897 0.00126349 2.10447423 0.00018145 0.00513650 0.03543
Freq 464.831673 4.68586528 99.1986849 455.643315 474.020030 0.00000
Phase 2.64538222 1.02110755 2.59069890 0.64312638 4.64763806 0.00963
Sine Component 7
Parm Value Std Error t-value 95% Confidence Limits P>|t|
Ampl 0.00107682 0.00125621 0.85719903 -0.0013864 0.00354007 0.39141
Freq 504.085495 11.5549598 43.6250325 481.427758 526.743231 0.00000
Phase 4.65244395 2.51391351 1.85067781 -0.2770054 9.58189334 0.06433
Sine Component 8
Parm Value Std Error t-value 95% Confidence Limits P>|t|
Ampl 0.00049704 0.00124467 0.39933254 -0.0019436 0.00293766 0.68968
Freq 584.982679 22.6365919 25.8423477 540.595339 629.370019 0.00000
Phase 0.23525228 5.06332813 0.04646199 -9.6932594 10.1637640 0.96295
Sine Component 9
Parm Value Std Error t-value 95% Confidence Limits P>|t|
Ampl 0.00167434 0.00126080 1.32800340 -0.0007979 0.00414660 0.18429
Freq 676.322853 7.26325956 93.1156112 662.080569 690.565138 0.00000
Phase 2.49855735 1.59345130 1.56801614 -0.6259883 5.62310301 0.11700
Sine Component 10
Parm Value Std Error t-value 95% Confidence Limits P>|t|
Ampl 0.00115641 0.00125474 0.92162828 -0.0013040 0.00361679 0.35681
Freq 716.704632 10.8049850 66.3309235 695.517496 737.891767 0.00000
Phase 4.20526008 2.35839557 1.78310209 -0.4192394 8.82975952 0.07469
Sine Component 11
Parm Value Std Error t-value 95% Confidence Limits P>|t|
Ampl 0.00168481 0.00125529 1.34217171 -0.0007766 0.00414626 0.17966
Freq 788.178587 6.81910253 115.583918 774.807236 801.549939 0.00000
Phase 2.78457089 1.51172711 1.84197986 -0.1797245 5.74886630 0.06559
Sine Component 12
Parm Value Std Error t-value 95% Confidence Limits P>|t|
Ampl 0.00013451 0.00124383 0.10814171 -0.0023045 0.00257349 0.91389
Freq 891.849853 84.1026829 10.6042973 726.935699 1056.76401 0.00000
Phase 5.61542328 18.6715938 0.30074686 -30.997084 42.2279306 0.76363
Sine Component 13
Parm Value Std Error t-value 95% Confidence Limits P>|t|
Ampl 0.00254305 0.00124629 2.04050434 9.9251e-05 0.00498685 0.04140
Freq 973.555131 4.47151238 217.723904 964.787091 982.323171 0.00000
Phase 3.95781425 1.00047432 3.95593785 1.99601742 5.91961108 0.00008
Sine Component 14
Parm Value Std Error t-value 95% Confidence Limits P>|t|
Ampl 0.00033775 0.00127346 0.26522583 -0.0021593 0.00283483 0.79086
Freq 1068.72988 35.2305136 30.3353478 999.647539 1137.81222 0.00000
Phase 1.85138062 7.74770842 0.23895848 -13.340843 17.0436044 0.81116
Sine Component 15
Parm Value Std Error t-value 95% Confidence Limits P>|t|
Ampl 0.00011952 0.00128444 0.09305367 -0.0023991 0.00263814 0.92587
Freq 1103.30212 103.267784 10.6838945 900.807754 1305.79648 0.00000
Phase 5.64340425 22.2196513 0.25398258 -37.926371 49.2131795 0.79953
Sine Component 16
Parm Value Std Error t-value 95% Confidence Limits P>|t|
Ampl 0.00064445 0.00129689 0.49692440 -0.0018986 0.00318748 0.61928
Freq 1132.03406 19.3774055 58.4203109 1094.03755 1170.03057 0.00000
Phase 2.26500019 4.23970493 0.53423534 -6.0484962 10.5784966 0.59322
Sine Component 17
Parm Value Std Error t-value 95% Confidence Limits P>|t|
Ampl 0.00026307 0.00126589 0.20781233 -0.0022192 0.00274530 0.83539
Freq 1168.03732 45.0264138 25.9411581 1079.74652 1256.32812 0.00000
Phase 0.47329760 10.0870838 0.04692115 -19.306129 20.2527247 0.96258
Sine Component 18
Parm Value Std Error t-value 95% Confidence Limits P>|t|
Ampl 0.00095587 0.00125917 0.75912537 -0.0015132 0.00342493 0.44785
Freq 1206.09338 12.6278373 95.5106846 1181.33188 1230.85489 0.00000
Phase 3.69129444 2.76840985 1.33336270 -1.7371884 9.11977723 0.18253
Sine Component 19
Parm Value Std Error t-value 95% Confidence Limits P>|t|
Ampl 0.00022014 0.00124981 0.17613591 -0.0022306 0.00267085 0.86020
Freq 1279.41505 52.5883862 24.3288517 1176.29623 1382.53387 0.00000
Phase 1.85105366 11.6908163 0.15833400 -21.073079 24.7751864 0.87421
Sine Component 20
Parm Value Std Error t-value 95% Confidence Limits P>|t|
Ampl 0.00046434 0.00124386 0.37330825 -0.0019747 0.00290338 0.70895
Freq 1362.51851 24.1297298 56.4663805 1315.20332 1409.83369 0.00000
Phase 0.30700853 5.40425405 0.05680868 -10.290013 10.9040305 0.95470
Sine Component 21
Parm Value Std Error t-value 95% Confidence Limits P>|t|
Ampl 0.00029136 0.00124674 0.23370063 -0.0021533 0.00273605 0.81524
Freq 1489.95341 38.7039306 38.4961783 1414.06016 1565.84666 0.00000
Phase 1.94393101 8.61034817 0.22576683 -14.939814 18.8276764 0.82140
Sine Component 22
Parm Value Std Error t-value 95% Confidence Limits P>|t|
Ampl 0.00020148 0.00124394 0.16196736 -0.0022377 0.00264068 0.87134
Freq 1557.77551 55.9373688 27.8485661 1448.08979 1667.46124 0.00000
Phase 5.27178928 12.4194833 0.42447734 -19.081162 29.6247410 0.67125
Sine Component 23
Parm Value Std Error t-value 95% Confidence Limits P>|t|
Ampl 0.00105923 0.00123984 0.85432900 -0.0013719 0.00349040 0.39300
Freq 1752.22812 10.4708479 167.343479 1731.69618 1772.76005 0.00000
Phase 6.25664977 2.34153166 2.67203297 1.66521823 10.8480813 0.00759
Sine Component 24
Parm Value Std Error t-value 95% Confidence Limits P>|t|
Ampl 0.00040491 0.00123931 0.32672099 -0.0020252 0.00283502 0.74390
Freq 1958.49578 27.3625973 71.5756535 1904.84137 2012.15019 0.00000
Phase 2.13978641 6.11980452 0.34964947 -9.8603347 14.1399075 0.72663
Sine Component 25
Parm Value Std Error t-value 95% Confidence Limits P>|t|
Ampl 0.00037591 0.00123947 0.30327985 -0.0020545 0.00280635 0.76170
Freq 2531.71239 29.4744997 85.8950083 2473.91683 2589.50796 0.00000
Phase 2.80820893 6.58662528 0.42635019 -10.107286 15.7237034 0.66989
Sine Component 26
Parm Value Std Error t-value 95% Confidence Limits P>|t|
Ampl 9.7185e-05 0.00123938 0.07841437 -0.0023331 0.00252744 0.93750
Freq 2724.66043 114.167279 23.8655107 2500.79361 2948.52725 0.00000
Phase 6.14565613 25.5020656 0.24098660 -43.860496 56.1518084 0.80958
Sine Component 27
Parm Value Std Error t-value 95% Confidence Limits P>|t|
Ampl 0.00016001 0.00123822 0.12922720 -0.0022680 0.00258799 0.89719
Freq 2922.50502 69.4168688 42.1007900 2786.38779 3058.62225 0.00000
Phase 3.82074057 15.5204757 0.24617419 -26.612844 34.2543251 0.80557
Sine Component 28
Parm Value Std Error t-value 95% Confidence Limits P>|t|
Ampl 0.00016870 0.00123944 0.13611289 -0.0022617 0.00259908 0.89174
Freq 3114.55918 65.8128758 47.3244656 2985.50890 3243.60946 0.00000
Phase 5.33671571 14.7059237 0.36289565 -23.499641 34.1730724 0.71671
Sine Component 29
Parm Value Std Error t-value 95% Confidence Limits P>|t|
Ampl 0.00022872 0.00123899 0.18460439 -0.0022008 0.00265823 0.85355
Freq 3309.30399 48.5173732 68.2086389 3214.16788 3404.44009 0.00000
Phase 4.95270467 10.8420911 0.45680345 -16.307191 26.2126005 0.64785
Sine Component 30
Parm Value Std Error t-value 95% Confidence Limits P>|t|
Ampl 0.00024331 0.00123768 0.19658704 -0.0021836 0.00267024 0.84417
Freq 3699.52600 45.5528402 81.2139481 3610.20295 3788.84905 0.00000
Phase 4.82803529 10.1815749 0.47419337 -15.136676 24.7927469 0.63540
----- Original Message -----
From: "dark_november2000" <jhaible@...>
To: <yamahacs80@yahoogroups.com>
Sent: Tuesday, January 31, 2006 2:12 PM
Subject: [yamahacs80] RM
> I don't even get the list messages mailed to me anymore.
> Switched to web-only mode, to concentrate on my current
> projects.
>
> Found your mails about harmonics in RM sine.
>
> You made a Fourier analysis. What order of magnitude are the
> levels of these harmonics? It's not unusual for "waveshaped"
> (from other waveforms) sine waves to have something between
> 0.5% (quite good) and 3% (cheap, but quite usual) of THD.
>
> 3% means -30dB which seems high on a spectrum analyser, even
> though it's pretty normal for that kind of stuff.
>
> So in what order of magnitude were the harmonics you measured
> in the CS-80 ?
>
> JH.
>
>
> > Juergen? Still no time?
> > Thx for your reply.
> > Max
> > By the way: I looked back into some lists including the AH board
> but found
> > nothing about the Chorus : does the ON/OFF switch arm the chorus
> without the
> > LFOs modulation?
> > M
> > ----- Original Message -----
> > From: "Max Fazio" <faxiomas@v...>
> > To: <yamahacs80@yahoogroups.com>
> > Sent: Sunday, January 22, 2006 1:16 AM
> > Subject: [yamahacs80] Speed Modulation
> >
> >
> > > Hi all
> > > This is especially for Juergen.
> > > I've been happy to read a nice discovery you made about the
> differences
> > between amount and speed modulation in the CS80, I refer to your
> message on
> > the Analogue Heaven board of October 16th, 2003;
> > > Quoting
> > > > You never stop learning - last night I read a CS-80 review at
> > > > www.amazona.de , and suddenly learned that the smaller CS-synths
> > > > are missing another fine detail of the CS-80: Sub Osc (LFO)
> speed
> > > > modulation via aftertouch!
> > > >
> > > > Surprised that I never had noticed this before, a question
> > > > was immediatly arising: The CS-80 has polyphonic aftertouch, but
> > > > there is only one Sub Oscillator. So the CS-80 must also emulate
> > > > monophonic aftertouch internally. I consulted the schematics,
> and
> > > > found that there is in fact a set of diodes which creates the
> > > > *maximum* of all individual pressure sensors, and uses this to
> > > > control the LFO speed. As expected.
> > > >
> > > > But there's more, and this is where it may become interesting:
> > > > The diodes cause a voltage drop of approx. 0.5V, and there is
> > > > no compensation circuit for this. So I expect the LFO speed
> > > > modulation to come *later* (at a higher threshold) than VCF /
> VCA
> > > > modulation when you gradually increase the pressure on a key.
> > > > This would allow some brilliance and volume modulation by
> > > > aftertouch without LFO speed modulation at low pressure
> > > > values, and LFO speed modulation joining in at higher pressure
> > > > values. Which would be another very sensible choice for a great
> > > > performance-type instrument.
> > > >
> > > > Can anybody confirm (or correct) this behavior?
> > > >
> > > > Now I know another mod I have to do for my CS-50 (;->)
> > > >
> > > > JH.
> > >
> > >
> > > End of quote.
> > > So what do you mean when you talk about the maximum number of
> pressure
> > sensors involved with the Speed trigger of S-O? and what about the
> % of
> > pressure that allows the trigger of the speed?
> > > Thx fr your reply
> > > M
> > >
> > > [Non-text portions of this message have been removed]
> > >
> > >
> > >
> > >
> > > Yahoo! Groups Links
> > >
> > >
> > >
> > >
> > >
> > >
> >
>
>
>
>
>
>
>
> Yahoo! Groups Links
>
>
>
>
>
>
[Non-text portions of this message have been removed]Message
FFT analysis plot ( very long , sorry ) was Re: [yamahacs80] RM
2006-01-31 by Max Fazio