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FM Synthesis (techniques, anecdotes)
look into the abyss. look into it.

fm synth synthesis modulation

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#1 Guest_skibby_*

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Posted 23 August 2013 - 11:10 AM

if you do a search in youtube, you might find this video about making a bass in fm:

 

 

however, i am afraid that most of the videos on youtube seem to be tutorials on how to make a skrillex bass.

 

however, a skrillex bass to me isn't really a bass, although it contains some bass fundamentals.

 

i am a little old school, so i prefer a bass instrument to contain mostly bass fundamentals, for the purpose of creating harmonies and other syncopated events.

 

I envision this thread to be a place where we can share patches or discuss getting actual bass sounds out of an fm synth,  (also leads, fx, whatever) and produce some knowledge about the subject for composers who like to use an FM synth as an instrument, not just a full frequency sausage effect.


Edited by skibby, 23 August 2013 - 11:11 AM.


#2 slightlydrybeans

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Posted 23 August 2013 - 11:22 AM

I have a Preen FM and use it all the time, but I'm afraid I don;t have much to offer in terms of theory or technique. :p Only that 2 or 3 operators at the same time seem to be the easiest to get workable sounds from. :D



#3 CharlesWatkins

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Posted 23 August 2013 - 02:20 PM

if you search google for "fm presets" or "fm reece" you should find some decent patches. of course i would recommend changing them a bit (even if you dont know wtf you're doing, you can always tiwddle some knobs)



#4 mcbpete

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Posted 23 August 2013 - 02:34 PM

This was the first [part of a] tutorial that actually made it click in my brain what FM synthesis is all about -



#5 Guest_chunky_*

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Posted 23 August 2013 - 08:45 PM

feedback is your friend for creating sawtooth and noise waveforms
sine and noise for all kinds of percussion
sawtooth for strings and bass
layer two sawtooths at same pitch, invert one then shift the phase for PWM
bells are easy
organ = use sinewaves like on an additive synth

if you have a modular with a multimode filter you can bring one of the outputs into the cv input. highpass, lowpass, bandpass feedback all give different wave form shapes. tuning might be out but you can use an analogue sequencer to control the pitch... then you have a sawtooth oscillator where you can control the harmonics all in one little module haha.

#6 Guest_maersk_*

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Posted 23 August 2013 - 11:58 PM

Just use the sine wave, maybe with a little subtle modulation. Give the modulator a percussive attack and low sustain. Yeah, the fundamental, that's all the bass is. If you put higher frequency partials in there it will cloud the mix with too much information, it's not rocket science.



#7 Guest_RadarJammer_*

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Posted 24 August 2013 - 11:18 AM

you can find the FM instrument patch rips from nearly every sega genesis game in a zip file somewhere on the net and then find your favorite sounds and load them into vgm music makers FM engine and you can try and translate those ratio and envelope settings into another 4 operator FM synth of your choice. that's how i got most of the presets for the 4FMmod ens i sent you. i forgot how i did or got all that though just google it.

 

you learn a lot by doing things like that


Edited by RadarJammer, 24 August 2013 - 11:22 AM.


#8 telefunken

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Posted 25 August 2013 - 02:47 AM

One of the best readings about OP ratios:
http://www.sfu.ca/~truax/fmtut.html



#9 slightlydrybeans

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Posted 26 August 2013 - 03:33 PM

woah great paper.



#10 sun drugs

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Posted 27 August 2013 - 05:31 PM

recently got a dx100.  loving it so far besides the mini keys. 

When questions arise, ill be back



#11 th555

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Posted 29 August 2013 - 03:15 AM

you can find the FM instrument patch rips from nearly every sega genesis game in a zip file somewhere on the net and then find your favorite sounds and load them into vgm music makers FM engine and you can try and translate those ratio and envelope settings into another 4 operator FM synth of your choice. that's how i got most of the presets for the 4FMmod ens i sent you. i forgot how i did or got all that though just google it.

 

you learn a lot by doing things like that

I got this .zip with the VOPM vst that loads them perfectly.



#12 psn

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Posted 31 August 2013 - 12:26 PM

I think someone posted this in another thread here a couple of years back:

 

 

Messing with the coarse tuning of op4 (2:45-3:00) reminds me of some of Squarepusher's modulation freakouts:

 



#13 poblequadrat

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Posted 31 August 2013 - 02:45 PM

you can find the FM instrument patch rips from nearly every sega genesis game in a zip file somewhere on the net and then find your favorite sounds and load them into vgm music makers FM engine and you can try and translate those ratio and envelope settings into another 4 operator FM synth of your choice. that's how i got most of the presets for the 4FMmod ens i sent you. i forgot how i did or got all that though just google it.

 

you learn a lot by doing things like that

 

Just remember that VOPM patches have their output levels reversed (i.e. a D1L of 15 means no sustain and a TL of 127 means that operator is off). I guess this is pretty obvious but it got me a bit confused at first because I'm daft like that.

 

Also, I haven't figured out the best way to convert operator outputs that go from 0 to 127 to the DX21 scale which goes from 0 to 99. Doing it proportionally sounds similar but getting the exact same sound requires a bit of tweaking.



#14 Guest_skibby_*

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Posted 15 September 2013 - 01:07 PM

every other time i try to load a patch in vopm, it crashes.

 

im still trying to understand what about some FM sounds is the 'cool' sounding part, and how to repeat that.

 

why do fm synths need 4 to 6 operators?  what is gained from the 3rd one for example?  juts more complexity in the harmonics?



#15 Guest_A/D_*

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Posted 24 September 2013 - 04:24 PM

This one time at FM synthesis camp I stuck a carrier wave up my operator.

#16 John Ehrlichman

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Posted 24 September 2013 - 06:02 PM

every other time i try to load a patch in vopm, it crashes.

 

im still trying to understand what about some FM sounds is the 'cool' sounding part, and how to repeat that.

 

why do fm synths need 4 to 6 operators?  what is gained from the 3rd one for example?  juts more complexity in the harmonics?

are you on OSX? I Could never get any of the patch loading features to work on VOPM for intel mac. The PC version is the only one that seems to work properly for me



#17 Lane Visitor

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Posted 24 September 2013 - 06:15 PM

just messed for a while with an fm7 patch last night, spent a while editing the envelopes of all the operators and it was just a reminder of just how deep fm synthesis goes. like, all i wanted to do was come up with a funky, raw but also nice sounding pluck, and it took me years just to figure out which operators to use and which not.. by that time, i just said fuck it and started turning knobs and drawing slopes and having fun, and ended up making a weirdish square synth bassy pad thing, which i slapped some yummy valhalla ubermod on, and started making a trip hop beat over it. it was fun. but im still never patient enough to go all deep into fm.. like id rather just produce and make the music. although i have been able to come up with a few cool unique things by tweaking presets. Most of the time, ill just use the fm7 presets when im using fm 7, cuz i love a lot of em (ill do slight changes, and process them differently of course.. but man, that warm brass sound.. can't get enough. i could make a whole album with just that patch haha 

 

i know thats lazy but i dont really care, id rather focus on the vibe/music/atmosphere.

 

i bought myself a yamaha ys200 (4 op synth) a while back and actually tried to use the atari st editor which is super fun cuz its so stipped down, non-intuitive, and an awesome eye sore lol. i feel like a hacker from the 80s when im programming it lol. ive made some really cool (bad) digital sounding bass squawks, but 4 op is really hard to make sound good, even in a cheap way, unless you devote a shit ton of time into it. the ys200 actually has some presets that i still love to this day that i havent heard on the fm 7 anywhere, or in any of the original tx or dx patches. 

 

fuck, i love the fm sound. 


Edited by Lane Visitor, 24 September 2013 - 06:21 PM.


#18 Boxus

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Posted 24 September 2013 - 09:08 PM

I like setting one ratio to 1 or 2 thousands off a whole number value for some vibrato.



#19 psn

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Posted 25 September 2013 - 12:44 AM

Don't forget Chowning's text:

 

http://synthzone.com...pplications.pdf



#20 Guest_EleminoP_*

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Posted 25 September 2013 - 05:09 PM

Been circuit bending a Yamaha Portasound PSS-270 lately. You can make various connections that mess up the patch parameters. Stuff gets Autechre fast with this thing.

#21 Lane Visitor

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Posted 30 March 2014 - 05:49 PM

God I love FMMMMMM!!!! It's all i need in my prod. setup.. some good top notch modern drums samples, some good top notch vintage drum samples, and my FM7.



#22 sun drugs

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Posted 11 April 2014 - 07:05 AM

anyone got any good tutorials or starting points to begin with fm on a dx100, i know its a simple starting point but seems a little daunting at the moment, trying to make nice deep pads and some dub techno stabby synths  



#23 Guest_skibby_*

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Posted 15 April 2014 - 08:10 AM

 

https://archive.org/...wners-manual-v1


Edited by skibby, 15 April 2014 - 08:10 AM.


#24 Mesh Gear Fox

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    not even going to read the thread lmao but check this out →

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Posted 15 April 2014 - 07:28 PM

anyone got any good tutorials or starting points to begin with fm on a dx100, i know its a simple starting point but seems a little daunting at the moment, trying to make nice deep pads and some dub techno stabby synths  


i like the algorithm where 4 feeds into 1 2 and 3 evenly (think it's number 6). for dub tech stabs, do a quick envelope on the carrier oscs and play with an even quicker decay on op4 with the feedback up. tune one of the carriers an octave higher and play around with the detune a little but I believe you only get a range of -6 to 6 cents which isn't huge.

#25 Antape

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Posted 01 May 2014 - 12:01 AM

Don't forget Chowning's text:

 

http://synthzone.com...pplications.pdf

 

I'm not sure I'll get through all of this but thanks for pointing it out, it looks like a very good thing to start with!







Also tagged with one or more of these keywords: fm, synth, synthesis, modulation