Ring Modulation...and more!

Discuss John Bowen Synths - Solaris
polybonk
Posts: 15
Joined: Sun Jul 21, 2013 1:11 am

Re: Ring Modulation...and more!

Post by polybonk »

Another example of how wild it can get with the Cross mod on the JP6
https://soundcloud.com/polybonk/jp6-crossmod-swamp

2 layers this time. One of them into a delay. More sound design territory than musical.
I really appreciate you taking the time with this. I have always wondered what Solaris would be like if I could recreate this kind of structure.

On a side note I have almost completed a full sound bank of patches to share with everyone.

Thanks so much for your help.

t_tangent
Posts: 4
Joined: Fri Dec 05, 2014 7:57 am

Re: Ring Modulation...and more!

Post by t_tangent »

Not sure if the following links are of any use but they have some related info on the JP6 Cross Mod so I figured I would post them just in case. :)

http://www.florian-anwander.de/roland_jp6/
Modification No.2: Change logarithmic VCO2-to-VC01-modulation to linear FM

and

https://www.gearslutz.com/board/showpos ... stcount=73

I tried this mod out a while ago but in the end I seem to recall reverting back to the original Cross Mod as I preferred the whackier timbres it produced.
Last edited by t_tangent on Wed May 27, 2020 12:14 pm, edited 1 time in total.

John Bowen
Site Admin
Posts: 1898
Joined: Sat Apr 07, 2007 3:00 am

Re: Ring Modulation...and more!

Post by John Bowen »

Well, it’s interesting that he states it is logarithmic FM instead of Exponential FM. That is a key to the results you are hearing.

Could you make an example of the 2 saw waves that you did, with the Cross Mod at full amount, then play across the keyboard, say, C2 E2 G2 C3 E3 G3, etc.?

polybonk
Posts: 15
Joined: Sun Jul 21, 2013 1:11 am

Re: Ring Modulation...and more!

Post by polybonk »

Thanks for the info T_tangent


Hey John.
No problems. Here you go.
This Jupiter 6 is in need of a service so some of the voices are out from one another unfortunately. But its close enough.

https://soundcloud.com/polybonk/full-cr ... ple-keys-2

So Logarithmic FM hey. Is that something we could do with the AM modulators? I don't have Solaris hooked up at the moment so I cant remember.

John Bowen
Site Admin
Posts: 1898
Joined: Sat Apr 07, 2007 3:00 am

Re: Ring Modulation...and more!

Post by John Bowen »

Well, I’m not sure if this is really correct, as I see at https://electricdruid.net/roland-cross-mod-metal-sync/ the author states,
>
> Jupiter 8 “Cross Mod” is FM from VCO2 modulating VCO-1. This is described in the manual as “ring modulation style effects” which is true in as far as they can both produce non-harmonically related pitches. Technically, they’re not similar at all.
>
> Note that this FM is fed to the 1V/Oct CV input of the oscillator, so it is exponential FM, not linear FM.
>
> The Jupiter 8 also offers classic hard sync from VCO-1 (master) to VCO-2 (slave) with its “sync” switch.
> Jupiter 6 Cross Mod and Sync
>
> Jupiter 6 “Cross Mod” is FM from VCO-2 to VCO-1, just like the Jupiter 8. There is a CEM3360 VCA which controls the amount of FM, and this can >be set manually (the “Manual” slider in the Cross Mod section) or via Env-1 (the “Env-1” slider in the Cross Mod section). The Jupiter 6 is more >sophisticated than the Jupiter 8 in this respect – it allows envelope-controlled FM depth, whereas FM depth is a fixed setting on the Jupiter-8.


So, is it exponential or logarithmic FM?

polybonk
Posts: 15
Joined: Sun Jul 21, 2013 1:11 am

Re: Ring Modulation...and more!

Post by polybonk »

Its interesting that. I have always wondered why I can get all this insane sonic evolving territory on the JP6 that I cannot get on any other FM implementation. Maybe its the multiple waveforms combined within the VCO's that give it the unique effect.

Do you think that routing several oscillators into a mixer and then using them to do FM on one of the oscillators would do something similar?

On this site someone was asking the same thing and says:
"A few (vague) sources on internet forums suggest that the cross-modulation is exponential frequency modulation of oscillator-1 by oscillator-2."

https://music.stackexchange.com/questio ... -synthesiz

bennethos
Posts: 41
Joined: Mon Feb 24, 2014 2:12 pm

Re: Ring Modulation...and more!

Post by bennethos »

I got X-MOD on my JP-8000, sounds extremely digitally agressive when I play it. But might investigate again to see if I can get JP-6 results but I doubt it :p
Owner of Solaris #00324

aasddsfvd343
Posts: 1
Joined: Fri Sep 18, 2020 10:23 am

Re: Ring Modulation...and more!

Post by aasddsfvd343 »

So Logarithmic FM hi there. Is that something we could do with the AM modulators?you can play music I don't have Solaris mounted in the interim so I cant consider.

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