Sidebstudio

COLOURMIXER - Summing mixer with colour modules
« on: February 08, 2020, 03:52:12 AM »
Hi,
this is my first post here.

I usually build custom gear and last year a customer asked me to build a summing mixer with different flavours on channels so I though about a modular solution to let me adapt on each channel different “analogic colours” without having to elaborate many different pcb layouts.
Instead of building something super custom I tried to design something around COLOUR MODULES (the open source format around DIY world).

And the result was the first COLOURMIXER (V1.0).
This custom built unit has a Control room/MONITOR section and one of our bus compressors inside.





At the beginning of develop of the first colourmixer I designed a pcb with DIP components.
Each channels has THAT corp balanced line receivers/drivers (1240/1646) and a dual opamp to deal with colour module.
The balanced line drivers are used to take a direct output from each channel.
All the channels going to an opamp summing circuit.




Later I arrived at first “final” version with the option to mount THAT corp receivers/drivers or standard opamps in all the circuit.





Last month I built a unit with an elaboration of the previous concept: I put an each channel a colour module to deal with saturation/colour on each channel, a direct output for each module and a summing circuit in which I can use DOAs or opamps for summing and a colour module.
8 channels goes to “drive” channels and then into sum and 8 channels goes directly in summing stage in which I could deal with colour&drive/saturation.







The idea is to offer something to work with in
- tracking (preamp → input → direct out)
- in mixing (8 channels with colour and 8 without)
- mixing with 4 stereo stems but with the possibility to record tracks back into DAW with direct outs in order to make revisions
export in analog using 8 inputs with “drive” off + 8 clean inputs and maybe giving a touch of colour with the “Drive” in summing section

I have some PCBs of first prototype with DIP parts (THAT corp balanced line receivers/drivers (1240/1646) and a dual opamp to deal with colour module).
If someone is interested in them or into the complete project we could consider to make a PCB kit, due to the “open source” idea behind COLOUR modules.

Here you can hear it in action (first unit):

https://youtu.be/stuzLYlyMcI

Cheers,
Alessandro/Side-b Studio

« Last Edit: February 08, 2020, 04:05:29 AM by Sidebstudio »
Handmade analog solutions in the digital era
http://sidebstudio.it/


matriachamplification

    Prince Edward County, Ontario, Canada
  • Posts: 84
Re: COLOURMIXER - Summing mixer with colour modules
« Reply #1 on: February 14, 2020, 12:32:11 AM »
Hello Side B Studio. This is very interesting and in line with some personal ideas envisioned regarding the DIYre Colour Pallet System.

Am interested in hearing more about the build kits Side B Studios are considering.

PM Sent.
If you are curious, you'll find the puzzles around you. If you are determined, you will solve them.
Erno Rubik

abbey road d enfer

Re: COLOURMIXER - Summing mixer with colour modules
« Reply #2 on: February 14, 2020, 02:06:15 AM »
Hi Alessandro, nice build!
Where did you get the 19" chassis and the IDC transition connectors?
Who's right or wrong is irrelevant. What matters is what's right or wrong.
Star ground is for electricians.

Sidebstudio

Re: COLOURMIXER - Summing mixer with colour modules
« Reply #3 on: February 15, 2020, 04:37:31 AM »
Hello Side B Studio. This is very interesting and in line with some personal ideas envisioned regarding the DIYre Colour Pallet System.

Am interested in hearing more about the build kits Side B Studios are considering.

PM Sent.

Hi.
Thanks for interest.
I tried to reply but I have a failure message from the server.
I have a few PCBs of first prototype (dip) and a complete set of smd one.
The smd contain a little error (you have to use a 1mm short jumper to fix it)
Handmade analog solutions in the digital era
http://sidebstudio.it/

Sidebstudio

Re: COLOURMIXER - Summing mixer with colour modules
« Reply #4 on: February 15, 2020, 04:39:34 AM »
Hi Alessandro, nice build!
Where did you get the 19" chassis and the IDC transition connectors?

Chassis are from modushop

Idc transition you mean the one on db25 PCB/backpanel?
I think I bought them from mouser.
I usually buy from farnell/mouser and a few of other European suppliers for knobs (don audio etc)

Handmade analog solutions in the digital era
http://sidebstudio.it/

abbey road d enfer

Re: COLOURMIXER - Summing mixer with colour modules
« Reply #5 on: February 15, 2020, 05:09:32 AM »
Chassis are from modushop

Idc transition you mean the one on db25 PCB/backpanel?
I think I bought them from mouser.
I usually buy from farnell/mouser and a few of other European suppliers for knobs (don audio etc)
Thanks, I'll check them.
Who's right or wrong is irrelevant. What matters is what's right or wrong.
Star ground is for electricians.

boji

Re: COLOURMIXER - Summing mixer with colour modules
« Reply #6 on: February 20, 2020, 02:51:40 PM »
Nice idea! Have you any colour module variants in the works?

Sidebstudio

Re: COLOURMIXER - Summing mixer with colour modules
« Reply #7 on: February 21, 2020, 01:25:54 AM »
Nice idea! Have you any colour module variants in the works?

Hi. Yes the colours modules I used in this first units are mine.
One is a transistor based colour/saturation the other one is a reproduction (in colour format) of a super simple opamp based circuit that simulates a multiple stage (overdriven) that you could find in a solid state console.
I prefer the subtle sound of the second to the obviously saturation of the varieties of colours modules in commerce
Handmade analog solutions in the digital era
http://sidebstudio.it/

boji

Re: COLOURMIXER - Summing mixer with colour modules
« Reply #8 on: February 23, 2020, 12:04:56 AM »
808 sounds evil, nice work.  I've tried a few and haven't found any secret weapons, but the Mojo Maestro one is fun. Let us know if you plan on putting any module kits out there? Thx.   

 

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