VCV Rack // Cytomic - Doepfer module suggestions

[Rastkovic]

Great sleuth work everyone! The A-124 was a fun circuit to model, and I'm very happy with the results. Hopefully for those that have never heard the original Eurorack version may be tempted to buy the hardware after having a play with this, and likewise those that own the hardware may like to buy the software version which you can have multiple copies running at once and also use polyphonically inside VCV Rack.

Lovely! Were you involved with the Softube Doepfer stuff at all? Are you allowed to say whether there is more Doepfer in the pipeline?

I was not involved with the Softube Doepfer modules. And yes, there are more modules in the pipeline I've got a few I'd like to tackle, but I also would like to ask the community for their input, since there are a lot of Doepfer modules to check out! (edit: we may want to start a new thread for input on this since it may be off topic for some)

Andy asked for input. So what Doepfer module(s) would you like to see in VCV Rack?

[Rastkovic]

A "simple" one, the original VCLFO A-147. It has a special behaviour when you create feedback loops and/or when it is modulated by one or more LFOs. The emulation by Softube doesn't properly cover this.

[WatchTheGuitar]

As I posted on the VCV forum

I’ve been intrigued by many Doepfer modules so just hoping to try them out. The A107 multitype morphing filter, A196 phase locked loop, A137 wave multipliers, A171 slew generators etc

[wintoid]

Andy asked for input. So what Doepfer module(s) would you like to see in VCV Rack?

For me, the obvious answer is all the Softube modules, so I don't have to load Softube any more

[andy-cytomic]

Thanks everyone for the suggestions thus far! I'm interested in hearing from people that have used a bunch of different Doepfer modules on which ones they like the most.

[j wazza]

im more interested in the modules that arent covered by softube for more variety as i can just use softube for those ones and would be less likely to buy ones that i can use softube for,

although i may buy a few especially a doepfer mixer made by you guys

as i said on vcv forum, the doepfer tzvco modules and the pwm effect would be cool

maybe a waveshaper

i have a eurorack system with some doepfer modules and these are my favourite ones

[j wazza]

to truly emulate doepfer youll need to emulate the manufacturing faults like modules being built at slightly different sizes and not even fitting into a doepfer-made case

[andy-cytomic]

...

as i said on vcv forum, the doepfer tzvco modules and the pwm effect would be cool

maybe a waveshaper

i have a eurorack system with some doepfer modules and these are my favourite ones

Thanks for this feedback. The two osc I thought would be best from reading the specs are:

* A-110-2 Basic VCO
* A-110-6 Trapezoid Thru Zero Quadrature VCO

The Basic VCO looked like the most compact but useful module, that has a sawtooth osc core, which I prefer for PWM sounds, and the through zero trapezoid for the FM type zingy sounds and it can also be used as on LFO.

[j wazza]

...

as i said on vcv forum, the doepfer tzvco modules and the pwm effect would be cool

maybe a waveshaper

i have a eurorack system with some doepfer modules and these are my favourite ones

Thanks for this feedback. The two osc I thought would be best from reading the specs are:

* A-110-2 Basic VCO
* A-110-6 Trapezoid Thru Zero Quadrature VCO

The Basic VCO looked like the most compact but useful module, that has a sawtooth osc core, which I prefer for PWM sounds, and the through zero trapezoid for the FM type zingy sounds and it can also be used as on LFO.

id be happy with that, i have a 110-4 which is good but the 6 looks like it does a bit more, id also be interested in other non doepfer modules from you in the future as cytomics analog modelling is top class

[andy-cytomic]

Just to manage people's expectations as well: me talking here about modules I'd like to tackle doesn't constitute me promising to deliver them. Before I decide to do a module I'll have to have it in front of me and test it out and check over the schematic to make sure it's something that will be reasonable to do within the constraints of not being a cpu hog, and then I have to try and do the model and then have it sound good, so it's a long road with many potholes. Once a module is done and released, then I'll let people know to expect it, but till then I make no promises or commitments of what will be done!

[vurt]

https://youtu.be/1d2kuwEN4iU


i imagine this would be popular.

[whyterabbyt]

A-106-1 Xtreme filter (MS20 based) (https://doepfer.de/A106.htm)
and
The original A-111 high-end VCO, using the CEM3340 (https://doepfer.de/a111.htm)

BTW does the Wasp filter have the self-oscillation mod? (https://doepfer.de/DIY/a100_diy.htm)

[bmanic]

@andy-cytomic

Would it be possible the make "The Scream" as a module within VCV?

As for the Doepher modules, I'd definitely love seeing the A-111-6 that vurt just linked in a youtube video.

[WatchTheGuitar]

Valley’s (free) Interzone is like the guts of an SH-101

https://library.vcvrack.com/Valley/Interzone

[andy-cytomic]

A-106-1 Xtreme filter (MS20 based) (https://doepfer.de/A106.htm)
and
The original A-111 high-end VCO, using the CEM3340 (https://doepfer.de/a111.htm)

BTW does the Wasp filter have the self-oscillation mod? (https://doepfer.de/DIY/a100_diy.htm)

The A-106-1 does look interesting, do you have one?

There are no public schematics for the CEM3340 that I know of (I'm talking about the actual circuit diagrams with all components and values of everything inside the IC, not the datasheet!), but if you know of one and can post me a link I'd appreciate it It's difficult to model something accurately without a schematic, otherwise it's just guesswork and rough behavioural modelling (ie just modelling what the IC appears to do from the outside).

The A-124 "self-oscillation" mod doesn't really work. If you lower the resistor value of R13 (which is what happens if you put another resistor in parallel with it) then it does this to the cutoff / resonance, which boost the resonance to just below self oscillation - if you have enough noise at the input and do some modulation of the cutoff then this does keep the filter just ringing out, but it's not really strong self oscillation like in other filters: