FM synthesis on sega genesis

[god0fgod]

Should the frequency adjust logarithmically (Like musical notes) or should it be linear in FM synthesis? And for each note, should the frequency deviation be a constant amount or should it be a factor of the notes fundamental frequency?

[trollainas]

BLAST PROCESSING BITCH!!!!

[Sharikoff8]

@trollainas The Speed That Melts Your Face

[AdamDallas]

Return of Shinobi? :D

[hotlanta71]

i would be really interested in using one of my old genesis' FM chips to make a hardware synth. It would be an interesting mate to an analog synth!

[gocaca]

cool what hardware u build?

[locobeis]

now i got a question, can i use the fm chip of a sega and use it as a synth module to control with a keyboard just like an instrument?

[gocaca]

i have seen that done before on utube

[MiracleKD18]

what is the first song? I'd like to get it....

Btu yeah...

The Sega Mega drive is the best console of all times.... and FM synthesis rules!

[gocaca]

thanks bro the songs are from the game revenge of shinoby

[malducci]

... which leads me to believe if you did know what you're talking about, then you would *see* the absurdity of this video. And the *absurd* claim that you can't explain it because it's 'mathematical'. Might as well not explain how an engine works because the physics behind it is too complex. Like I said, you responses smell like bullshit.

[gocaca]

i cant explain to unintelligible lifeforms like yourself its beyond your knowledge go and get a foundation in advance mathematics then come back

[gocaca]

now goodnight life form that is scared of math do your own damn research are u afraid to do this? can u not read and understand? can u comprehend things? use what ever ability u have in that brain and enlighten yourself from that stupid ignorance

your attitude leaves much to be desired now good night go research

[gocaca]

this attitude leaves me no other choice 2 do something i never do but its late almost 2am and dealing with someone who lacks knowledge and has an attitude to boot is not a mix i prefer when i have important work at hand , my final advice get yourself out of that low level of thought and realize that there is much more to things than a description i am sorry but this is utube and its not my life so i will do what is needed in order 2 continue my important work at hand

[gocaca]

@ganjerific well i g2g im busy but thanks anyway

[malducci]

Here, let me help you out. FM synthesis: a carrier's (tone/sound) frequency is modulated by another carrier (which is silent). The modulator's frequency is of a specific set of ratios to keep the main carriers 'tone' in tune. The result is additional harmonics heard in the carriers tone. These are cyclical pitch changes. Attaching amplitude envelopes to the modulator, allows the sound to model a more realistic instrument, or a completely new sounding one. That is basic FM synth. No math needed

[gocaca]

lol dude thats obvious thats the description the mathematics behind that is complex

dont make me laugh

[malducci]

The math behind anything can be complex, it doesn't mean the target audience needs that level of understanding in order for you to explain. If you actually 'know' it, then you have no problems putting it into simple explanations. Matter of fact, the math isn't even required to understand FM synthesis. Many musicians have a firm understanding of the synth without understanding the underlying math. I don't need to explain band-limited synthesis math in order to explain simple PSG pulse tones....

[gocaca]

at higher levels the math is most important because the mathematics is used in designing now please i must go

since u know about Bessel then u wont have a problem in understanding how it relates 2 fm synth

[gocaca]

quoting u again:

"Posting a video with some generic scrolling text, that less information than a single wiki search on Sega Genesis, is utterly useless. And it really questions what kind of person would post something like this and think/treat it as information. But hey, just like you other 'scrolling document' educational videos. WTF, man?

perhaps u have not read the description it says "brief intro" do u understand what that means ?

[gocaca]

ok i consider this debate over now i do have 2 go i have work to be done

[malducci]

A whole video for a small amount of generic text???

[gocaca]

its obvious the mathematics behind fm synth is 2 complex 2 put here so yea a whole vid 4 generic text has 2 suffice

[malducci]

1) The video doesn't explain anything. All you did was list the chips. 2) Itdoesn't require complex math to explain FM (or PSG). The 2612 isn't even real FM. It's phase index modulation. All digital. A simple sinewave table, a frequency counter, and another frequency counter's sinewave output modulates the phase index pointer. The timbre of the sound is controlled be passing the modulating carrier through a volume table first and then an envelope, allowing dynamic control over the timbre.

[gocaca]

while u are correct do u think all those things happen by magic sorry it does not fm synth is a mathematical process that happens inside an ic do some research i am en engineer so please dont get me started on this it is beyond the scope of u tube

understanding fm synth is mathematical

now i am very busy read the description and u will see the mathematical function that is used for fm synth the rest is up 2 u to do ur own research and understanding i dont have time 2 help u with that part

[malducci]

*Oh my god*. You're soo full of sh*t. You can't even form proper sentences and your grammar is worse than a 8 year old. You expect me to believe that you're an *engineer* and yet you can't even simplify an explanation of what FM in relation to audio is? Do you even understand the very basics of FM(PM) synthesis? Oh wait, it's "mathematical". LOL

Looking over some of your other videos, I can see you really are full of it. It's pretty pathetic.

[gocaca]

well since u wanna show me your utter stupidity i shall say 2 u one thing stay in your ignorance since u have no IN DEPTH KNOWLEDGE ABOUT FM SYNTH

thats not my problem fool

i do not wast my time on garbage like u i am very busy bye ...and yes its mathematical u ignorant piece of crap u have no brain so suffer in your ignorance

[malducci]

Hahaha. You nothing about me, what I do, and what experience I have in audio. I need to show some people this haha I don't know a lot about you, but I can tell you this: anyone with any sort of credible knowledge of what they're talking about, wouldn't post completely useless videos like these and try to past them off as substance. Your video list shows a history of this. Anyone who questions you gets a "ur retarded i dont have time for you' response. Yeah... *nothing* suspicious about that ;)

[gocaca]

dude i am doing some late night work on the pc and lo and behold i see an email from u not surprisingly though

i dont know about u nor do u know about me in the world of academia u will be laughed at since fm synth is mathematical when u go in depth that as i said before is beyond the scope of utube (im an not your tutor)

i have already told u what part of math is used for fm synth i wont repeat it

[malducci]

The only thing you listed was a Bessel function reference - hahaha. Since 'utube' isn't the *place*, why don't you send me a personal message explaining what you "think" you know ;) PS: I'll know if you're bullshitting or not. I have direct experience writing (read: coding) synth emulation and creating (coding) new synth designs from scratch. I have direct experience with low level audio applications.

[gocaca]

and my area is designing the microchips/circuits from scratch u will have to do the reading on Bessel i dont have time 2 write a paper for anyone

as right now im doing some circuit designs and its 1am

and to understand Bessel u will need a firm foundation in mathematics and i do not know what level of mathematics u are at

if u already the foundation u are most welcome 2 do your research and u will see how it ties into fm synth

i really am very busy person and i ask that u respect my time

[malducci]

I already know what the hell a Bessel function is you dumbass. It describes the harmonic characteristics of a complex waveform derived from frequency modulation. It has nothing to do with creating FM (PM) on a hardware level. The music "harmonic" ratios from modulator to carrier are already known. Matter of fact, the IC itself is fairly simple. Even multiplications are replace with addition units, because everything in the chip is done with logarithmic steps.

[gocaca]

so good night the rest is up to u,i have to continue my work and i have a ton of calculations to do goodnight

[malducci]

And my original point, you DON'T need to know the math behind 'FM' synth to explain it. If you know how it works, then it's really easy to explain. Posting a video with some generic scrolling text, that less information than a single wiki search on Sega Genesis, is utterly useless. And it *really* questions what kind of person would post something like this and think/treat it as "information". But hey, just like you other 'scrolling document' *educational* videos. WTF, man?

[gocaca]

dude as an engineer i study things in depth to the core so for me in depth analysis is a must therefore if i have to explain fm synth the math is a must but this is left for higher levels of study now please i ask u i must continue my work here its almost 1 30am and i have circuits unfinished

[gocaca]

and as i quote u here:" Anyone who questions you gets a "ur retarded i dont have time for you' response"---i ask u 2 prove that! and u know u cannot

is absolutely absurd i will like u to show numerous examples(from all my other videos etc) to support that statement

since u are now delving into the realm of utter stupidity to fight your argument which shows lack of decorum i leave u in ignorance

[gocaca]

i have already told u where u will find the relevant mathematics behind fm synth and i will not explain no more since i can see from your last comment u are at the lowest basic level of understanding in future i ask u do not display 2 me your ignorance anymore because i will not respond 2 someone who lacks intellectual ability like yourself because to put it simply it wastes my valuable precious time so good riddance

[gocaca]

i am glad u know that then u should have no problem 2 see how it ties in the study of fm synth (research and read )

now i really have to go

ps the more impolite u get does not show me that u have knowledge it brings u down

[choerone]

what synth was used to make the noises on the second song?

[gocaca]

the same process of fm synthesis is used 2 create all sounds on the sega genesis

as the vid says its basically 3 chips combined its the actual mathematical process used 2 make these sounds

in the 2nd sound clip (as with most sega genesis games) most of the synth sound is done in the fm synthesizer Yamaha chip producing those lovely string instrument sound

[KIFulgore]

Cool vid :). Quick trivia fact, the Zilog Z80 was also the main CPU in the Game Boy. It's been used for millions of things.

The main Motorola 68000 CPU in the Genesis was also used all over the place.

[gocaca]

i agree all the facts are factual thanks mate 4 the comment

[BlindfoldedParrot]

Awesome points for using tracks from Revenge of Shinobi.

[gocaca]

thank u very much mate

[zedrein18]

The Genesis will live on in our hearts.

[gocaca]

yes it shall one of the best indeed

[MistKnacker]

Many go on about how the Genesis has a "low quality DAC".

I don't think this is the case.

Tiido created a Z80 sound driver that uses 2 PCM channels simultaneously, and they sound clear. It can do up to 36 Khz according to what he's posted on the Sega forums.

Also, he's created Z80 sound & music players where you can convert audio files to rom format and play them on emulators or the real Genesis. I've converted some of my songs, and they sound decent. The players range from 12 Khz to 37 Khz.

[gocaca]

i think the genesis had a great DAC for its time in fact i am amazed at the sound capabilities of this chip its just like back when we had the sid chip 4 the c64 at that time that was very impressive

thats great work on the Z80 sound drivers i like that idea of using any audio file then converting it 2 the genesis format thats very good work Tiido my complements 2 him and thank u 4 giving me the info on this

[Ibbod0]

the PSG chip has 4 tones;

3 square sounds + 1 noise channel

is this correct?

[gocaca]

yes this is correct

[Keijz74]

And PSG, does it stand for Programmable Sound Generator?

[gocaca]

yes it does

[Keijz74]

Oh, forgot to say: nice synthesizer sound.

[gocaca]

thanks mate very much appreciated!

the sega cd was the first 2 have PCM then the 32x

[Keijz74]

The drums are PCM, aren't they?

[gocaca]

actually only the sega cd had PCM capabilities

the sound here is only the genesis alone

[Keijz74]

So the drums are FM synthesizer generated!? Cool sounding. :o)#

[gocaca]

the fm synth chip has a digital audio channel (DAC)this in conjunction with the Z80 does the drums ,if i remember this correctly,it also used samples for effects,voices,and some drums

[DaJaeff]

how did you do this? please tell me i simply LOVE the way a genesis sounds

[thiagotecnico]

not ZIGLOG, but ZILOG. anyway it's sound is incredible. sometimes I show this musicvideo to audio programming friends. thks

[gocaca]

thanks ,yes that is an error in spelling ur right thanks 4 pointing it out 2 me

[thiagotecnico]

Revolutionary bass sound

[gocaca]

thanks it really does have a nice bass sound