This is a two part Live stream where I build the Synthrotek MST Dual Envelope kit.
This kit is available from Synthrotek’s Store. You can grab this in kit form as seen here or as a completed module.
The Stream is completely live and I take questions and discuss not just the process of building the module but we talk synths in general. so sit back, and enjoy.
Part 1
Now that the Circuits have all been Built. we can wire them all together. This is really quite straight forward. Simply wire everything in parallel. This means that the power wiring for each module goes directly back to the source. This allows us to not have voltage drop across each component.
make sure to leave plenty of extra wire so that you can place knobs and connectors where ever you want in your enclosure.
I will return shortly to show how everything is mounted in the case and give it a nice run through!
This circuit is actually very very simple to assemble and shouldn’t really take you more than a half hour tops to build.
It comprises of a board with pads for a few knobs and jacks, as well as a few extra parts so that you can play around and add modifications to the circuit. The PT2399 is a chip that is found in MANY guitar delay pedals. It is a digital chip that emulates the analog bucket brigade. As delay times get longer, the audio degrades. This can be used to great effect when you start to play with long delay times and feedback.
In this video I build the PT2399 Dev board, I do not show me building in any mods. The reason for this is I want you to feel free to experiment with the board. you won’t harm the chip its quite robust and is great fun to play with “circuit bending” it. just basically wire up a momentary switch (included with the kit) and touch the leads to any two points you find interested (by poking a piece of wire around you may find the chip behavior act interesting). For the final circuit I went with the suggested Feedblast the warp and the feedback as pictured below.
instructions for these mods can be found HERE https://www.synthrotek.com/kit-assembly-instructions/other/pt2399-dev-delay-assembly-instructions/
The kit only costs : $30 so… hard to beat for a funky ass delay right?
Check the video and have fun!
The 555 Timer Oscillator from Synthrotek will be a modulation source for our upcoming Delay Dev kit circuit. (and other circuits as we will keep this modular!)
the Idea is to use this to modulate the rate of the delay board.
For this project, we won’t be hooking up power just yet as I plan on daisy chaining the power off of another circuit first.
we also will not solder on the attenuator just yet as we will be using wire so that we can place the board more efficiently inside of the case. You can buy the 555 Timer LFO HERE—> Synthrotek Store it’s only $15.
This series is supported by 
and from sales of My Sound libraries at 
Now that we have established some basics it is time to take a look at what we are actually going to be doing in this series. I want to start off by giving a list of the Synthrotek Kits we will need in order to complete this series. You can purchase these kits as we go along or all of them upfront (getting them upfront is not a bad idea as we will likely have some live Q&A sessions and it will be nice for you to have the kits ready).
Here are the planned kits that will be involved.
1) Passive Ring Mod Kit (think Dalek voice)
2) 4093 Chaoss Nand kit (drone oscillator)
3) 555 Timer kit (this will be used as an LFO to control delay etc)
4) Dirt Filter 9v kit (distortion and filtering)
5) PT2399 Dev Board kit (this is a digital delay that emulates analog delay chips)
6 Vac Pack (adds CV control to any variable resistance controlled circuit)
7) Plastic Enclosure (this will be what we place all our items into) you are not limited to use just this case, feel free to use more than one case or a larger case if you like.
For some time now I have really loved the Brute series from Arturia. I also tend to be the type of person to just never be satisfied even when things are going great. So today I decided to modify my brutes. The one feature I always wished the Minibrute had was LFO output so that it could be used to control my modular. Well today I rectified that problem with a simple mod that you can do with very basic tools.
All that is needed is a few mono 1/8″ jacks, some wire, some solder, a soldering iron, a screw driver and a drill.
Here is a list of the solder points and what they are. The video below details not only how to perform this mod, but how to actually find these types of modifications yourself!
—- LFO OUTS :
PT34 = SAW LFO , PT32 = TRIANGLE LFO, PT35 = SINE LFO, PT33 SQUARE LFO, PT130 = RANDOM LFO,
PT176 SELECTED LFO
——- VCO OUTS :
PT180 = SQUARE SUB VCO, PT7 = SQUARE VCO, PT119 = TRIANGLE VCO, PT120 = SAW VCO
—————-
MICROBRUTE
TP93= SQUARE VCO, TP94 = SAW VCO, TP102 = SUB VCO, TP124 = TRIANGLE VCO
This is a wonderful 8 step analog sequencer complete with 3 different CV pitch outputs, 8 gate outputs, clock in , clock out, random, random rate, momentary stepping and holding.
Just a very very usable sequencer in a nice compact form that is super powerful. they can even be configured to run off of 9v battery power!
for more info head to Synthrotek.com