Couple of things.

Quadra is discontinued... unless you're looking for a used Quadra, Quadrax is the new version (tons of added functionality, too).

Turing Machine is terrific... but Mutable Instruments' Marbles is essentially an expanded Turing Machine with added functionality. It's really terrific, and I'd suggest using it instead of the TM and expanders.

You don't have a filter in either version... that seems like a serious omission, especially given your oscillator choice.
-- Shakespeare

Good call on the Quadra! Not intentional.

I had a lot of fun with marbles in VCV, but my only concern is that it doesn’t have a whole ton of outputs vs the Turing expansion. Easily remedied by pairing with a small sequential sequencer? Or maybe I really don’t need that many random sources.

Good catch re: filter! Forbidden planet seems like it might be my vibe.


This thread has helped me immensely! Providing an update here in case someone like me is looking for advice in the future and can see where I started and where I’m winding up…

It’s pretty clear I didn’t have a solid enough understanding of the basics/fundamentals — I found this tutorial which I found to be the best explanation the basics I’d seen:

With that under my belt I dove into VCV as suggested, as well as an iOS app called “miRack” to try some ideas out and see what I actually needed to get the kinds of results I’m interested in. This was super eye opening, and gave me a hands on understanding of the suggestions that I needed way less randomness and logic, and more sound shaping and control. This has led me to the following revision as my ideal starter kit:

ModularGrid Rack

And then my “day 1 / minimum viable rack” which is where I’ll start my purchases:

ModularGrid Rack

Feeling pretty good about where things are are, but more than open to any further suggestions!


first I would get a bigger case (6u/104hp is a good sized starter case) so you can actually build a modular synth in it rather than a collection of a few modules that won't play nicely together

you need to add modulation, envelope generators, utility modules

either a bigger case or cut back to 1 or 2 voices at most - otherwise not enough space for the support modules you need

-- JimHowell1970

Thanks for the great feedback! I’m such a n00b and could use some more examples of what you mean by utility modules. I have 8 LFOs, and 6 VCAs — what other basic utilities do I need other than an envelope generator? Pardon my ignorance


Hi all, I’ve designed my first rack for creating generative & ambient soundscapes. I’m pretty happy with it but now the question is what modules to purchase first. Looking at the below rack - if you had to start with only 3 modules, which would it be? Also open to feedback on the chosen modules /things I’m missing!

ModularGrid Rack