Thursday, 14 June 2018

Modular in the Lounge Room- Meeting 3

Lots of fun.
The 3rd MITLR was held on the 2nd June in Wollongong... at secret location with what has been voted as the lounge room with most uncomfortable lounge on the South Coast (& possibly the world).
I'm quite proud of this distinction so will have to ditch any thoughts of buying a new couch:-)

The music was however really good. Thanks to Andrew, Ilya, Justin, Paul, Dee, Terry, Rory and Gareth for making it a memorable night.



Rory Satori


Allinaire  (aka: Cobramatic)

Post Global Disorder (Terry)

We were all blown away by the new graphic VCO from Erica Synths


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Gareth  AKA Oscillosaurus



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Thursday, 17 May 2018

Sequential Circuits - Drumtraks - Drum Tracks

Some pics of my old Drumtraks. I'm considering selling this.
To quote Vintage Synth:
"While its electronic drum kit sounds may not be as popular today as the TR-909 or TR-808, the DrumTraks exceeds them with superior editing capabilities."
Main panel features a segment display, 13 dynamic trigger pads, 9 buttons and numeric pad.
I'll probably miss this if I do decide to sell , but I'm running out of room. I have too many drum machines.
The Drumtracks hails from 1984.
 At the time of its manufacture it was the only drum machine that let you program both volume and tuning individually for each sound.

 The inclusion of Midi lets you program all your drum parts, including volume dynamics and accents in real time from any velocity sensitive instrument, such as the Prophet-T8.

The clock in and out is very useful.
DrumTraks can output a clock signal and is also fully MIDI capable. This makes it very easy to use with old analogs and new MIDI synths and sequencers.
- analog sync IN at 24 /48 /96 PPQ resolution, but it outputs only at 24 / 48 PPQ 

The metronome out generates +5V pulses.
The cassette in/out is for offline memory storage.

There are six individual outputs, one mono mix output.
The drum has an onboard mixer.
Each of its 13 different drum sounds had its own programmable tuning and volume controls.
The 13 sounds include bass drum, snare, rimshot, tom (x2), crash cymbal + ride, open/ closed hihat, handclaps, tambourine, cabasa and cowbell.

 The Pattern edit section

You can store 100 patterns & build 100 songs.
The song edit section with its  9 button numeric pad.

The drum uses PCM waveform samples coded at 12 bit resolution. They are stored on socket EPROMS (Erasable Programmable Read Only Memories).
It is possible to change the soundset by swapping the eproms.

Dimensions (WxDxH): 21 3/8 x 10 x 4 inches
Power: 110 V AC

Sunday, 13 May 2018

Noise Engineering - BIA - Basimilus Iteritas Alter

Some tweaking of this incredible module.

Noise Engineering have made a work of art.
It's much much more than a drum. Fabulous for baselines.

I'm using a Wintermodular eloquencer to sequence the BIA
Sometimes it just sounds so good without any CV sequencing from the eloquencer.
All u need are triggers & gates.

Thursday, 10 May 2018

NLC Resonate - build notes

These are my build notes for the Nonlinearcircuits Resonate module.
It's in the Eurorack Format.

The Resonate Module uses the core circuit of the Korg 3100 Resonator, with component choices for the filter sections as per the mods introduced by RJB in his blog back in 2005.
The  Korg PS3100 is famous for the sound of its resonator.

The main difference of the NLC version is that it has 4 VC bandpass stages and a feedback control, whereas the original has 3 stages and no feedback. The 4 VC bandpass stages can be controlled by a single CV on input 1 (with an attenuator) or individually with each of the 4 CV inputs.
The CV processing sub-circuits are greatly simplified from the original Korg version, simply using op amps to drive the vactrols.
The 2 inputs are summed together. Out 2 is an inverted version of Out 1.

Demo Video -

sOME NLC words of wisdom
Nouveau shamanic - another Nicolas Cage Reference.
Nouveau Shamanic is the name he's given to his personal acting style.
 "thousands of years ago, the tribal shamans were really actors. What they would do is they would act out whatever the issues were with the villagers at that time, they would act it out and try to find the answers or go into a trance or go into another dimension, which is really just the imagination, and try to pull back something that would reflect the concerns of the group."

Back to the build.
I like to get the ICs on first.
I'm using a new solder:
This is brilliant stuff. It's not cheap, but flows so easily and is only 0.35mm. It's 5 core.
I've up to now been using 0.7mm single core.

tHESE rectifiers are a protection against plugging in the module backwards.

I'm using 1.0 K resistors for the RLs - LED resistors.

I'm using NSL vactrols

The white dot on the vactrol is the cathode.
On the PCB, the cathode is marked "k"
Install the headers which join the two PBCs


NLC Build notes
Muffs - 2018 modules

You can find more NLC builds here.

Zlob - Clock Divider

A great module. Its just 2HP
These aren't official build notes.
The Zlob website is here:

The build docs are slightly different from my version which I think is currently under revision
 However, it works great.

the 4040 ic must be the type that can run on up to 15V.
The trannies are 2N3904

You need to solder those 5 two pin jumpers, and then connect them with a shunt/shorting block.
This version has these pins for expansion purposes. (With the 16 pin header next to it). I could also solder each of the 2 pins together, if I didn't want the future expander.
For more Euro DIY builds click here: