Messages From yamahablackboxes

 


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#1136 Apr 17, 2012

Hey all,

Anyone out there ever tried to figure out if there are certain values of the LFO speed setting on a dx7 where they sync to a particular bpm/bpms? Someone did this for the ESQ-1/SQ-80, with great results.

I would like to be able to design S&H noise that locks in with a groove. Anyone have a chart?

I'd figure it out for myself... but dont really know where to start...

best

Raffi



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#1137 Apr 17, 2012

The obvious answer would be to use your ears, of course... But:

Hz = Beats per second. Try making a noise where you can see the effect

of the LFO on the waveform and opening it in a waveform editor. Measure

the time between peaks and multiply by 60. I think



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#1138 Apr 17, 2012

Hey all,

Anyone out there ever tried to figure out if there are certain values of the LFO speed setting on a dx7 where they sync to a particular bpm/bpms? Someone did this for the ESQ-1/SQ-80, with great results.

I would like to be able to design S&H noise that locks in with a groove. Anyone have a chart?

I'd figure it out for myself... but dont really know where to start...

best

Raffi



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#1139 Apr 17, 2012

---Links-Are-Forbidden--- are tons of bpm to ms or HZ converters out there... Just google bpm to ms or bpm to Hz

..Hey all,

Anyone out there ever tried to figure out if there are certain values of the LFO speed setting on a dx7 where they sync to a particular bpm/bpms? Someone did this for the ESQ-1/SQ-80, with great results.

I would like to be able to design S&H noise that locks in with a groove. Anyone have a chart?

I'd figure it out for myself... but dont really know where to start...

best

Raffi



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#1140 Apr 17, 2012

I've never come across anyone who has done it.There aren't really tables in any of the manuals that do this.There are so many different models of FM, it's really up to the user of each model to do the legwork.The way I'd do it:Make a NOISY waveform (ie: lots of feedback maxxed out) and gate that on and off with the LFO on AM if your unit will allow, or PitchMod to an extreme setting if not.In PitchMod mode, play the lowest note possible (VIA a sequence of MIDI notes in your audio software), and then the PitchMod of the sound should bring it up from near-dc to pitched enough for you to measure it.Please share your results!

I do most of my LFO Synching stuff on the Korg MS2000r, which has it all sewn up, but I need to plug my FB-01 Back again. I miss it's aggro.

/ErJ

..Hey all,

Anyone out there ever tried to figure out if there are certain values of the LFO speed setting on a dx7 where they sync to a particular bpm/bpms? Someone did this for the ESQ-1/SQ-80, with great results.

I would like to be able to design S&H noise that locks in with a groove. Anyone have a chart?

I'd figure it out for myself... but dont really know where to start...

best

Raffi







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#1141 Apr 17, 2012

OSCILSCOPE SHOULD MAPP IT OUT

HA , MAYBE pmod WILL HAVE AN OVER ALL EFFECT.

??? WHO KNOWS , I DON'T

IT PROBALLY IN SOME OBSCURE HIDDEN MICRO PROCESSOR USER MANUAL FOR THE RATE

OF THE CLOCK OR SOMETHING ???

GUESS WORK IS BEST WORK

CHARLES



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#1142 Apr 18, 2012

I look into my numerous books about DX7 programming in different

languages but didn't find any table for this. Different sources say

total LFO speed range is between 0.1 to 60 Hz (that would give one

cycle in ten seconds to 60 cycles in second) , or 0.5 to 50 Hz (one

cycle in 2 seconds to 50 cycles in second).

PMOD will produce vibrato effect.

LFO speed as a parameter of FM synthesis has absolutely nothing to do

with CPU clock.

Guess work is not necessary, exact LFO speed values can be analyzed,

but it needs some time. Anyway I don't think it's so important because

we can't synchronize LFO speed with MIDI clock - which is probably

what original sender of this question wanted to get.

Daniel Forro

> CHARLES



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#1143 Apr 17, 2012

so would it variate as you go up the keyboard in octaves?

charles



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#1144 Apr 18, 2012

No, why? On synthesizers LFO speed has no relation to pitch produced

by oscillator (= operator in the case of DX). What more: for example

on the DX7 II it's possible to invert keyboard by microtuning, so

pitch goes down when we play up on the keyboard. And LFO keeps its

speed.

Something different can occur on samplers, when somebody samples sound

with vibrato. When sample is transposed, modulation speed will change

according to it (together with timbre).

Daniel Forro> charles



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#1146 Apr 18, 2012

You can use the "LFO Sync" parameter on the patch to synchronize theLFO with the Note-On event. Which will do exactly what the originalposter wants in most cases. If you don't want to re-sync on everynote, you can create two copies of the patch in memory one with LFOSync turned on and one without. Then depending on whether you wantto re-sync the LFO on any particular beat you choose which patch touse. You could even create a silent patch with the LFO Sync optionset and use it just for re-syncing the LFO whenever you want.(Though it might disrupt any other notes that were sounding at thetime.)

--

Jesse







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#1147 Apr 18, 2012

i have the feeling the poster wanted to track the harmonic flux at a

certain time rate then write a song at a non conflicting tempo

too bad that vibrato, chorus and volume swell might interfer

with the lfo , basically i think he/she wanted to do like a drone sustained

chord or something , then play a beat

the same tempo as the rise and fall of the "LFO"

charles



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#1148 Apr 18, 2012

sounds like he is trying to do tempo wobble typelfo basses



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#1149 Apr 18, 2012

Here is DX7 LFO record, from 99 to 0 (note that 0 is also a valid value).Now,just :) [countthe beats per 1 second] x 60 = bpm

I'm to lazy to do this. But I was not lazy to makethe record LOL...

rianna doemaata

From: jammie jammie.emma@...>To: yamahablackboxes@yahoogroups.com Sent: Thursday, April 19, 2012 12:57 AMSubject: Re: [yamahablackboxes] Re: DX7 LFO frequency hz bpmsounds like he is trying to do tempo wobble type lfo basses



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#1150 Apr 19, 2012

I took a look at my TX7 and did the necessary math to figure theseout. It should be the same for the DX7, but I don't have one ofthose. Accuracy is not 100% guaranteed, but these should be veryvery close. LFO Rate ms Hz BPM 0 15876.559988 0.062986 3.779156 1 7938.279994 0.125972 7.558312 2 3175.311998 0.314930 18.895781 3 2268.079998 0.440902 26.454093 4 1587.655999 0.629859 37.791562 5 1323.046666 0.755831 45.349874 6 1058.437333 0.944789 56.687343 7 882.031110 1.133747 68.024811 8 793.827999 1.259719 75.583124 9 690.285217 1.448677 86.920592 10 635.062400 1.574648 94.478905 11 567.020000 1.763606 105.816373 12 529.218666 1.889578 113.374686 13 481.107878 2.078536 124.712154 14 441.015555 2.267494 136.049623 15 417.804210 2.393466 143.607935 16 387.233170 2.582423 154.945404 17 369.222325 2.708395 162.503716 18 345.142608 2.897353 173.841185 19 330.761666 3.023325 181.399497 20 311.305098 3.212283 192.736966 21 294.010370 3.401241 204.074434 22 283.510000 3.527212 211.632747 23 269.094237 3.716170 222.970215 24 260.271475 3.842142 230.528528 25 248.071250 4.031100 241.865996 26 236.963582 4.220058 253.203465 27 230.095072 4.346030 260.761777 28 220.507778 4.534987 272.099246 29 214.548108 4.660959 279.657558 30 206.189091 4.849917 290.995027 31 200.969114 4.975889 298.553339 32 193.616585 5.164847 309.890808 33 186.783059 5.353805 321.228276 34 182.489195 5.479776 328.786589 35 176.406222 5.668734 340.124057 36 172.571304 5.794706 347.682370 37 167.121684 5.983664 359.019838 38 163.675876 6.109636 366.578151 39 158.765600 6.298594 377.915619 40 154.141359 6.487551 389.253088 41 151.205333 6.613523 396.811400 42 147.005185 6.802481 408.148869 43 144.332364 6.928453 415.707181 44 140.500531 7.117411 427.044650 45 136.866896 7.306369 438.382118 46 134.547119 7.432341 445.940431 47 131.211240 7.621298 457.277899 48 129.077723 7.747270 464.836212 49 126.004444 7.936228 476.173680 50 124.035625 8.062200 483.731993 51 121.195114 8.251158 495.069461 52 118.481791 8.440115 506.406930 53 116.739412 8.566087 513.965242 54 114.219856 8.755045 525.302711 55 112.599716 8.881017 532.861023 56 110.253889 9.069975 544.198492 57 108.743562 9.195947 551.756804 58 106.554094 9.384905 563.094273 59 104.451053 9.573862 574.431741 60 103.094545 9.699834 581.990054 61 101.124586 9.888792 593.327522 62 99.852579 10.014764 600.885835 63 98.003457 10.203722 612.223303 64 88.203111 11.337469 680.248115 65 87.146786 11.474892 688.493546 66 79.023602 12.654447 759.266835 67 72.525814 13.788194 827.291647 68 71.282514 14.028686 841.721152 69 65.778591 15.202515 912.150881 70 60.639639 16.490863 989.451803 71 59.645546 16.765711 1005.942667 72 55.530099 18.008252 1080.495112 73 51.608203 19.376764 1162.605869 74 51.064959 19.582900 1174.974016 75 47.625350 20.997221 1259.833251 76 47.136885 21.214809 1272.888518 77 44.101556 22.674937 1360.496229 78 41.374594 24.169422 1450.165299 79 40.966962 24.409913 1464.594805 80 38.535340 25.950206 1557.012351 81 36.505468 27.393156 1643.589384 82 35.986433 27.788250 1667.295000 83 34.163177 29.271283 1756.276951 84 32.341141 30.920369 1855.222131 85 31.898111 31.349818 1880.989105 86 30.393693 32.901563 1974.093771 87 28.876018 34.630813 2077.848787 88 28.620479 34.940017 2096.401008 89 27.236769 36.715075 2202.904501 90 25.957515 38.524489 2311.469351 91 25.735656 38.856597 2331.395811 92 24.562892 40.711819 2442.709139 93 24.357344 41.055379 2463.322718 94 23.279413 42.956409 2577.384524 95 22.367080 44.708563 2682.513778 96 22.095415 45.258258 2715.495504 97 21.168747 47.239452 2834.367145 98 20.383072 49.060319 2943.619115 99 20.143271 49.644370 2978.662199

Attached zip contains the above table in an HTML file.

--

Jesse On 4/17/2012 3:30 PM, raradna@... wrote:Hey all,

Anyone out there ever tried to figure out if there arecertain values of the LFO speed setting on a dx7 wherethey sync to a particular bpm/bpms? Someone did this forthe ESQ-1/SQ-80, with great results.

I would like to be able to design S&H noise that locksin with a groove. Anyone have a chart?

I'd figure it out for myself... but dont really know whereto start...

best

Raffi






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