New to the Kosmo format but already love what I have seen. I have looked through the whole Kosmo thread but can’t see anything regarding modules that will take a balanced line from a daw and boost it up to modular level.
Is that still something that needs to happen in the Kosmo format? I know it is with euro rack.
Apologies if I have missed something obvious but looking to get either a mono signal or stereo balanced into a kosmo rig so I can play around with effects etc on vocals and anything else.
Electrically, Kosmo is basically the same as Eurorack. Just bigger, with 1/4" jacks. So yes. I don’t know that anyone’s done a Kosmo format module for line level input, but if you know of a DIY Eurorack module that’ll do what you want, you could adapt it to the Kosmo panel format. Alternatively, maybe a modification of the Ken Stone Stomp Box Adapter could work, it’s made to take instrument level to synth level and back. Really it’s just a passive attenuator on one end and a simple gain stage on the other.
Ok great, really helpful thanks dude. Mosaic make some nice little 1u in and out modules so maybe I can just make a Kosmo size panel that will house them sort of thing.
Will check out the Ken Stone Stomp Box adapter though for sure as could also work well.
Amazing, I am ideally gonna find one that takes a balanced signal as that is what is gonna be coming out of my DAW. I currently use a reamp box to convert that to instrument level to then go into some pedals. If I can avoid that step then I am laughing all the way to the bank!
Will check these links out for sure.
I am mainly looking to run audio out of my DAW and into a bunch of cool fx modules in my kosmo rig so on the hunt for some interesting ones out there.
I guess the joy of the format though is I can use normal eurorack modules as well by 1/4 to 1/8 inch cables?
Could this be used as an in and out then from my DAW? If my daw went straight into the fx in? The gain be enough to boost line level signal to Modular level in your experience?
I think I know what you mean but at the same time I could also have no idea!!!
This is all new to me as so far I have just completed full diy kits of guitar pedals etc where everything is laid out on the pcb with all parts.
I haven’t used a breadboard yet so think that is the next stage as can’t seem to find a pcb with BOM for what I am after, I want to understand it just a lot of new information coming at my brain!!!
When you say I only need the right part is that for just one channel of the increase for a mono signal?
Appreciate your time replying to all of the above, you guys on the forum are super helpful, lucky to have stumbled across it!!
Am I right in thinking that all I need is the input, the gain boost then the out? So I can just take that part of the stompbox adapter circuit and ignore the send and return part?
It’s designed with instrument level in mind, which is lower than line level, so you would presumably want to adjust component values for that. Also, for instrument input you need a high input impedance, usually around 1M — the first resistor there. I don’t really know what input impedance is appropriate for line level input but I would presume lower, maybe much lower.
Maybe some confusion on my part but stereo and balanced are two different things so, if you need stereo, you would need two copies of the circuit, one for each channel — and you would also need two synths, or anyway one synth with two of each module, one for each channel. If you need balanced inputs, that’s another thing, there’s some discussion here. I guess you can just add something like this
Hi-Z In - accepts outputs from transducers such as guitar pickups and contact microphones. It is also suited for amplifying low-level signals from tape machines, tuners etc.
There’s some discussion here but not for DIY stuff. They’re saying to just use a VCA with enough gain… which seems to me a waste of a VCA, a non voltage controlled amp would make more sense. And of course that would be for a mono, unbalanced signal. But the takeaway is that a 100k input impedance amplifier would do it, and from the above it sounds like 1M is also okay. The balanced input I pasted above, though, is 20k (ish). Maybe balanced inputs need the lower impedance.
ok cool, will let this sit in the brain and see if my understanding of how to make this a reality improves with more reading and learning. Thanks for all the info
