## Oberheim Filter

Device/Module Wishlist

Original topic on PlanetZ: https://forums.scopeusers.com/viewtopic.php?t=36493

#### Oberheim Filter

Posted: Thu May 21, 2020 2:04 pm
by al_bot
Was there an Oberheim like filter anywhere in scope, instrument or in modular?
I use the SATURN device and like it (except for the old style saving), but was hoping there was another.
Thanks!
Al

#### Re: Oberheim Filter

Posted: Thu May 21, 2020 4:23 pm
by Bud Weiser

> al_bot wrote: ↑Thu May 21, 2020 2:04 pm Was there an Oberheim like filter anywhere in scope, instrument or in modular?
> I use the SATURN device and like it (except for the old style saving), but was hoping there was another.
> Thanks!
> Al

Which "Oberheim like" filter do you mean ?
There existed different vintage Oberheim synths and there are today´s Tom Oberheim products cloning the vintage hardaware as also DSI/Tom Oberheim OB-6.
vintage:
The SEM , SVF and OB-X 2-pole low-, band-, hi-pass and notch filter w/ resonance
12dB LPF of OBX-a (2x CEM 3320 per voice)
12dB/24dB CEM- of OB-8 (1x CEM 3320 per voice)
The multimode filter generated by CEM 3372 signal generator of Xpander and Matrix-12
24dB LPF inside CEM 3396 (synth- on- a- chip) of Matrix-6 /Matrix-1000
They all sound different.
Bud

#### Re: Oberheim Filter

Posted: Thu May 21, 2020 5:15 pm
by al_bot
Good point, I should have clarified. Something like the Matrix-6 or the OB-Xa.

#### Re: Oberheim Filter

Posted: Fri May 22, 2020 2:12 am
by Spielraum

> al_bot wrote: ↑Thu May 21, 2020 2:04 pm I use the SATURN

since you mention saturn, you mean the possibility of crossfading.
orbiton syn-chrome offers similar. I like that very much.
http://scope.zone/index.php?id=1360&lg=de&d_2437=36
a transition is feasible. correct morphing less. but if the result is right.
look here
https://bcmodular-guide.000webhostapp.com/chapter/FILTER.html
and
http://www.cwmodular.org/filter.html
and
http://adern.com/adern-14/
and
http://www.modularsynth.co.uk/modulepages/all_v1_modules.shtml
and
http://scope.zone/server/public/scope/scope_plug-ins/sonic_core/sonic_core_modular/modular_4/modular_4_modules_de_en.pdf
morphing could be possible with a filter bank mutation
http://www.modularsynth.co.uk/modulepages/v3_new_modules.html
#i hope you find your happiness

#### Re: Oberheim Filter

Posted: Fri May 22, 2020 4:13 am
by Bud Weiser

> al_bot wrote: ↑Thu May 21, 2020 5:15 pm Good point, I should have clarified. Something like the Matrix-6 or the OB-Xa.

Matrix-6 is the easiest to model.
It´s just only a 24dB LPF.
OB-Xa used 2 CEM chips,- possibly 1 for the 2-pole (12dB) and the other for the 4-pole (24dB) filter.
But I myself,- I´d prefer the classic SEM state variable filter.
In fact, I´d like to have a SEM model for SCOPE and a shell mimiking key assignment options, offering global PB, vibrato and VCF cutoff controls, so a user is able stacking SEMs inside that shell.
In addition we´d get access to originally "internal" patchpoints and were able using these w/ SCOPE Modular.
Well, I can dream ...
B.t.w.,- the old Creamware "Blue Synth" device got new love on my end.
IMO it works very well for a lot of polyphonic synth patches while saving a lot of DSP cycles.
Bud

#### Re: Oberheim Filter

Posted: Fri May 22, 2020 4:21 am
by Bud Weiser

> Spielraum wrote: ↑Fri May 22, 2020 2:12 am ... the possibility of crossfading.
> orbiton syn-chrome offers similar. I like that very much.

How is crossfading betweem LP, BP and HP realised in Syn-Chrome ?
You just remind me on getting keys for the Orbitone devices,-
thank you !
Bud

#### Re: Oberheim Filter

Posted: Fri May 22, 2020 11:14 am
by al_bot
Cool! Thank you for the information! I'll have to check out Orbitone and bcmodular.

#### Re: Oberheim Filter

Posted: Fri May 22, 2020 4:16 pm
by Spielraum

> al_bot wrote: ↑Fri May 22, 2020 11:14 am Cool! Thank you for the information! I'll have to check out Orbitone and bcmodular.

check this...
https://forums.scopeusers.com/viewtopic.php?p=345157#p345157
cheers
\o/

#### Re: Oberheim Filter

Posted: Fri May 22, 2020 4:18 pm
by Spielraum

> Bud Weiser wrote: ↑Fri May 22, 2020 4:21 am How is crossfading betweem LP, BP and HP realised in Syn-Chrome ?

sorry, i meant the variable filter temperature

#### Re: Oberheim Filter

Posted: Sat May 23, 2020 10:55 am
by al_bot
Hello Spielraum, cool device, thx!
Also, quick question, the bcmodular - CEM3320 LP filter, I didn't see it in the Version 0.98b install or any of the older zips. Didn't see it in github list either.
Where do I download this filter module? Thx!