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LFO Speed in BPM and some LFO tricks

Martin Tarenskeen All Messages By This Member #15649 On Tue, 10 Dec 2013, Daniel Forró wrote: Thanks a lot, Martin, you did great job! That's missing and very important addition to Owner's manual. How you could measure Hz values with such precision? Hi, let me explain: - Very low frequencies where measured by measuring the time of a cycle in a wave editor or with a stopwatch. - Normal low frequencies where measured simply by counting the number of "beats" in a certain timespan (one minute for example) - Higher frequencies where measured using a wave editor and viewing the starting points of the cycles. - In the case of for example the FB01 I have reverse-engineered a formula that produced a table that (almost) matched my measurements. LFO_freq_Hz = 48. * (2 ^ (1. / 16.)) ^ (i - 250) the number '48' was the frequency I measured for i=250, where i is in the range 0 to 255 (8 bits). (If anyone can reverse-engineer a similar formula for the DX7, DX11, etc: that would be nice so let us know!) - Missing values where calculated using interpolation and extrapolation - The precision that my tablevalues suggest is probably higher than the real precision. - As extra study material I used a specification doc for one of the Yamaha FM chips (google seacrh for ym2151synthesis.pdf) that contained a table with values. I have attached a page from this document to this mail. MT
Martin Tarenskeen All Messages By This Member #15650 On Tue, 10 Dec 2013, Martin Tarenskeen wrote: - As extra study material I used a specification doc for one of the Yamaha FM chips (google seacrh for ym2151synthesis.pdf) that contained a table with values. I have attached a page from this document to this mail. Attached now :-) -- MT
Martin Tarenskeen All Messages By This Member #15651 On Tue, 10 Dec 2013, Martin Tarenskeen wrote: - In the case of for example the FB01 I have reverse-engineered a formula that produced a table that (almost) matched my measurements. LFO_freq_Hz = 48. * (2 ^ (1. / 16.)) ^ (i - 250) the number '48' was the frequency I measured for i=250, where i is in the range 0 to 255 (8 bits). P.S.: In the FB01 configuration parameters LFO uses a 7 bit value (0 ~ 127). Simply double this value to convert to the 8 bit range that is used for the voice parameters in my formula. -- MT
Martin Tarenskeen All Messages By This Member #15652 On Tue, 10 Dec 2013, Martin Tarenskeen wrote: - In the case of for example the FB01 I have reverse-engineered a formula that produced a table that (almost) matched my measurements. LFO_freq_Hz = 48. * (2 ^ (1. / 16.)) ^ (i - 250) the number '48' was the frequency I measured for i=250, where i is in the range 0 to 255 (8 bits). P.S. #2: When setting LFO waveform to S/Hold the FB01 behaves differently from the other DX/TX synths. You have to multiply the value with a factor of 200. The extremely low frequencies for the low values now become very usable for interesting quasi-sequencer effects. -- MT
Martin Tarenskeen All Messages By This Member #15657 This might be helpful too: -- MT
Eb Mayat All Messages By This Member #15658 - In the case of for example the FB01 I have reverse-engineered a formula? that produced a table that (almost) matched my measurements. LFO_freq_Hz = 48. * (2 ^ (1. / 16.)) ^ (i - 250) the number '48' was the frequency I measured for i=250, where i is in the? range 0 to 255 (8 bits). (If anyone can reverse-engineer a similar formula for the DX7, DX11, etc:? that would be nice so let us know!) Hello Martin et al, In the case of the DX11, the formula is? LFO_frequency(Hz) = 0.0057192x.^2 - 0.0033085x - 0.0171263 ? where x is the LFO setting ranging from 0 - 99. (Attachment enclosed). Regards, Eb On Thursday, December 12, 2013 3:47 AM, Martin Tarenskeen wrote: ? This might be helpful too: http://testtone.com/calculators/lfo-speed-calculator -- MT
Nikola Jeremic All Messages By This Member #15659 Hey group Really lots of thanx for a great docs, list and documents. ill compare this with my dx27s and update it until the i uploaded my dx27 sysex bank of 24 presets its in the group files uner "niko dx27 patches" file niko_dx27.syx or here https://drive.google.com/file/d/0B74jIqd_amgYT3l0TmVXUmh0Z28/edit?usp=sharing my personal naming of the patches so sory for that :) many sounds use extensively mod wheel-lfo thing Daniel, can i write u a private message? best? nikola
Daniel Forró #15663 Very good job you did indeed! Thanks for description. Daniel Forro toggle quoted message Show quoted text On 10 Dec, 2013, at 4:19 PM, Martin Tarenskeen wrote: - Very low frequencies where measured by measuring the time of a cycle in a wave editor or with a stopwatch. - Normal low frequencies where measured simply by counting the number of "beats" in a certain timespan (one minute for example) - Higher frequencies where measured using a wave editor and viewing the starting points of the cycles. - In the case of for example the FB01 I have reverse-engineered a formula that produced a table that (almost) matched my measurements. LFO_freq_Hz = 48. * (2 ^ (1. / 16.)) ^ (i - 250) the number '48' was the frequency I measured for i=250, where i is in the range 0 to 255 (8 bits). (If anyone can reverse-engineer a similar formula for the DX7, DX11, etc: that would be nice so let us know!) - Missing values where calculated using interpolation and extrapolation - The precision that my tablevalues suggest is probably higher than the real precision. - As extra study material I used a specification doc for one of the Yamaha FM chips (google seacrh for ym2151synthesis.pdf) that contained a table with values. I have attached a page from this document to this mail. MT
Daniel Forró #15665 Hi, Nikola, thanks for your sounds. I have answered your PM :-) All the best! Daniel toggle quoted message Show quoted text On 13 Dec, 2013, at 4:26 AM, <njeremic@...> <njeremic@...> wrote: Hey group Really lots of thanx for a great docs, list and documents. ill compare this with my dx27s and update it until the i uploaded my dx27 sysex bank of 24 presets its in the group files uner "niko dx27 patches" file niko_dx27.syx or here my personal naming of the patches so sory for that :) many sounds use extensively mod wheel-lfo thing Daniel, can i write u a private message? best? nikola
[email protected] All Messages By This Member #20987 Hi Martin, I can not find the file with the LFO speed BPM relation. Would it be possible to re send it or send a link or something? It would be really helpful. Thanks a lot in advance!!
LarryS All Messages By This Member #20988 开云体育 LFO is measured in cycles per second (Hz). 60 seconds in a minute, so: One? cycle per second (Hz) = 60 BPM Therefore LFO x 60 = BPM BPM/60 = LFO Hz 120BPM/60 = 2hz ? ? ? toggle quoted message Show quoted text From: [email protected] [mailto:[email protected]] On Behalf Of josechobernabe@... Sent: Wednesday, April 17, 2024 2:40 AM To: Martin Tarenskeen; [email protected] Subject: Re: [YamahaDX] LFO Speed in BPM and some LFO tricks ? Hi Martin, I can not find the file with the LFO speed BPM relation. Would it be possible to re send it or send a link or something? It would be really helpful. Thanks a lot in advance!!
Daniel Forró All Messages By This Member #20989 开云体育 Yes, this is general fact. But I suppose he wants to know the relation between DX7 parameter value and BPM, Hz, msec. Here is a table… Daniel Forró toggle quoted message Show quoted text On Apr 18, 2024, at 6:57, LarryS <vision1@...> wrote: LFO is measured in cycles per second (Hz). 60 seconds in a minute, so: One? cycle per second (Hz) = 60 BPM Therefore LFO x 60 = BPM BPM/60 = LFO Hz 120BPM/60 = 2hz? ? ? ? From:?[email protected]?[mailto:[email protected]]?On Behalf Of?josechobernabe@... Sent:?Wednesday, April 17, 2024 2:40 AM To:?Martin Tarenskeen;?[email protected] Subject:?Re: [YamahaDX] LFO Speed in BPM and some LFO tricks ? Hi Martin, I can not find the file with the LFO speed BPM relation. Would it be possible to re send it or send a link or something? It would be really helpful. Thanks a lot in advance!!? DX7 LFO frequency hz bpm.rtf DX7 LFO frequency hz bpm.rtf
[email protected] All Messages By This Member #20991 Exactly Daniel. This was indeed what I was looking for. Thanks a lot!!!
Martin Tarenskeen All Messages By This Member #20994 Some more notes about BPM and LFO speed from Daniel's table: 1. Depending on the rhythmical effect you want to obtain it can be required to multiply or divide the BPM number by a whole number like 2 or 3 or other. Also depends on time signature of the music. 2. If you use LFO with Sample&Hold waveform you may want to try a low value of the LFO speed parameter and multiply the BPM with a certain factor (can't remember the number but please experiment). This can give very useful rhytmic musically interesting effect. MT Verzonden vanaf mijn Huawei mobiele telefoon -------- Oorspronkelijk bericht -------- Onderwerp: Re: [YamahaDX] LFO Speed in BPM and some LFO tricks Van: josechobernabe@... Aan: Daniel Forró ,[email protected] Cc: toggle quoted message Show quoted text Exactly Daniel. This was indeed what I was looking for. Thanks a lot!!!
Martin Tarenskeen All Messages By This Member #20995 P.S. I have similar tables for Yamaha FB01, DX100/21/27/TX81Z etc. and Reface DX. Somewhere hidden in my messy harddisk archives. The LFO speed range from the FB01 is insane if I remember correctly :-) MT Verzonden vanaf mijn Huawei mobiele telefoon -------- Oorspronkelijk bericht -------- Onderwerp: Re: [YamahaDX] LFO Speed in BPM and some LFO tricks Van: josechobernabe@... Aan: Daniel Forró ,[email protected] Cc: toggle quoted message Show quoted text Exactly Daniel. This was indeed what I was looking for. Thanks a lot!!!
Martin Tarenskeen All Messages By This Member #21002 Attached some sheets from my collection of measurements and calculations. Op donderdag 18 april 2024 om 09:16:27 +02:00:00 schreef Martin Tarenskeen <m.tarenskeen@...>: toggle quoted message Show quoted text P.S. I have similar tables for Yamaha FB01, DX100/21/27/TX81Z etc. and Reface DX. Somewhere hidden in my messy harddisk archives. The LFO speed range from the FB01 is insane if I remember correctly :-) MT Verzonden vanaf mijn Huawei mobiele telefoon -------- Oorspronkelijk bericht -------- Onderwerp: Re: [YamahaDX] LFO Speed in BPM and some LFO tricks Van: josechobernabe@... Aan: Daniel Forró ,[email protected] Cc: Exactly Daniel. This was indeed what I was looking for. Thanks a lot!!! RefaceDX-LFO-hz-BPM.xlsx RefaceDX-LFO-hz-BPM.xlsx Tx7 LFO to BPM.pdf Tx7 LFO to BPM.pdf DX-LFO-Hz.xls DX-LFO-Hz.xls
[email protected] All Messages By This Member #21003 Wooow. That's really good, Martin!! Thanks a lot. Will definetly try it out.
Daniel Forró All Messages By This Member #21004 开云体育 Thank you, Martin! toggle quoted message Show quoted text On Apr 18, 2024, at 20:25, Martin Tarenskeen <m.tarenskeen@...> wrote: Attached some sheets from my collection of measurements and calculations. Op donderdag 18 april 2024 om 09:16:27 +02:00:00 schreef Martin Tarenskeen <m.tarenskeen@...>: P.S. I have similar tables for Yamaha FB01, DX100/21/27/TX81Z etc. and Reface DX. Somewhere hidden in my messy harddisk archives. The LFO speed range from the FB01 is insane if I remember correctly :-) MT Verzonden vanaf mijn Huawei mobiele telefoon -------- Oorspronkelijk bericht -------- Onderwerp: Re: [YamahaDX] LFO Speed in BPM and some LFO tricks Van: josechobernabe@... Aan: Daniel Forró ,[email protected] Cc: Exactly Daniel. This was indeed what I was looking for. Thanks a lot!!! <RefaceDX-LFO-hz-BPM.xlsx><Tx7 LFO to BPM.pdf><DX-LFO-Hz.xls>

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