Sunday, 8 July 2018
Doepfer 128 - Fixed filter bank modifications
Each band pass filter has its own amplitude control knob.
The unmodified 128 has just one output which is a mix of all the filters, depending on the position of each one's amplitude control knob.
It's a lovely sounding filter even though it has no CV control.
It's worth adding an output for each filter.
To do this you must remove the knobs aND faceplate
Ive made a breakout panel .. 4HP
You can find some mod instructions on Doepfers own site:
http://www.doepfer.de/service/A128_single_outputs.pdf
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Deluge - Synthstrom Audible
Held in Sydney
I'm very tempted to purchase a Deluge.
Some pics:
Ian also brought along one of the early existing Deluges.
It's interesting to see how it it has developed into the current beast.
The Deluge was developed in New Zealand
It's a drum machine, a synth. It integrates with Midi and voltage controlled synths.
Testing the Deluge with some eurorack gear (Metromodular).
Friday, 6 July 2018
Eloquencer - Copy A Track To Another Track In A Different Pattern
Saturday, 23 June 2018
Radio Music - Chord Organ - SD card
suggestions from James Bernard:
(just copy the 16 lines onto your text file).
1. [0,4,7,12,0] Major
2. [4,7,12,16,-5] Major inv 1
3. [7,12,16,-5,0] Major inv 2
4. [-12,-8,-5,0,4] Major inv 3
5. [-8,-5,0,4,7] Major inv 4
6. [-5,0,4,7,12] Major inv 5
7. [0,4,7,11,0] Major 7th
8. [4,7,11,0,16] Major 7th inv 2
9. [7,11,0,16,19] Major 7th inv 3
10 [-12,-8,-5,-1,0] Major 7th inv 4
11 [-8,-5,-1,0,4] Major 7th inv 5
12 [-8,4,7,11,23] Major 7th no root
13 [0,0,0,0,0] Root
14 [-24,-12,0,12,24] organ
15 [-8,-5,4,7,16] Major no root
16 [-12,0,0,12,24] 2 up 1 down octaves
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Note:
2. [0,3,7,12,0] Minor
3. [0,4,7,11,0] Major 7th
4. [0,3,7,10,0] Minor 7th
5. [0,4,7,11,14] Major 9th
6. [0,4,7,11,14] Major 9th
7. [0,5,7,12,0] suspended 4th
8. [0,7,12,0,7] Power 5th
9. [0,5,12,0,5] Power 4th
10 [0,4,7,8,0] Major 6th
11 [0,3,7,8,0] Minor 6th
12 [0,4,7,10,2] Dominant 9th
Tuesday, 5 June 2018
Diodes - Basic Info
The name diode is derived from “di–ode” which means a device that has two electrodes.
Orientation
- Small Signal Diode. ...
- Large Signal Diode. ...
- Zener Diode. ...
- Light Emitting Diode (LED) ...
- Constant Current Diodes. ...
- Schottky Diode. ...
- Shockley Diode. ...
- Step Recovery Diodes. (Snap-off)
- PN Junction Diodes
- Tunnel Diode (Esaki)
- Varactor diode (Varicap)
- Photo diode
- PIN diode
- Lazer diode
- Avalanche Diode
- Vacuum Tube diodes
- Crystal rectifier (crystal diodes)
- Gunn Diodes
- Thermal Diodes
- Stabistors or Forward Reference Diodes
- Gold-doped diodes
- Super barrier diodes
Sunday, 13 May 2018
Noise Engineering - BIA - Basimilus Iteritas Alter
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
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 - https://youtu.be/VD0j_Nwsv4w
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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."
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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
Nice.
Links:
NLC Build notes
https://www.nonlinearcircuits.com/modules/p/resonate
Facebook
Muffs - 2018 modules
Zlob - Clock Divider
These aren't official build notes.
The Zlob website is here:
https://zlobmodular.com/clk-d-2/
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
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.
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For more Euro DIY builds click here:
http://djjondent.blogspot.com.au/2017/12/diy-index.html
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Tuesday, 8 May 2018
Division6 - Dual Sequencer
It may never end. There are so many out there.
I thought this was worth a crack.
Fairly compact and cheap to build.
I was impressed with the Div 6 pocket sequencer so whynot.
These are not build notes, just some pics to help me remember the build process if I ever want to do it again. The build is quite easy.
The official notes are here:
http://division-6.com/products/dual-mini-sequencer.php
Its all through hole. No SMD
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For more Euro DIY builds click here:
http://djjondent.blogspot.com.au/2017/12/diy-index.html
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