I found this one on YouTube.
Both sound-wise and visually interesting enough to post here.
Video: Doepfer-Acid-Distortion
" Akai mpc60II, Doepfer A-100 system A-103/A-136, Video fx live. App
Audio - via headphones into iPads built in mic. Hence poor quality "
Uploaded by Corrosiveabuser
Find another one HERE
...a 'Tone and Texture' production, dedicated to Analogue Synthesis, Eurorack Modular and other Studio Gear...
Friday, June 15, 2012
Tuesday, June 12, 2012
Re-arranging my A-100 System

I seems like this just has to happen every few years...
It's was dirty job... a lot of screwing had to be done...
The main problem was the (old) location of my vocoder system, i had it in the middle of my rack.
That meant that i had a lot of wires hanging over the modules in the row below it.
I took out the vocoder modules and placed them at the bottom row.
My Joystick/Voltage inverter combo, the Modulation Wheels and the Manual Trigger modules were replaced to where the vocoder used to be, for maximum real-time control from the center of my setup.
The top three rows stayed the same, with mainly oscillators, noise mixers and filters (plus the 2 Theremin modules).
In row 4 i placed an extra A-180 Multiples next to my Quad ADSR so i can easily send multiple envelopes through my rack.
The rows below that have an assortment of various modules; LFO's, Distortion, Waveshaper, BBD and Frequency-shifter, to name a few... and my Trigger Sequencer, Divider, Inverters and Logic Modules.
At the lowest two rows on the left you'll find my inseparable section of modules from where i can switch playing-modes between Ribbon Controlled or by Keyboard (MIDI)-controlled... find and extensive post about this section HERE.
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The Vocoder and its cables that were causing the main problem. Note the frequency displacement |
Saturday, June 09, 2012
Doepfer MMR4/4 MIDI Merger/Router
In September 1996 Doepfer released the MMR4/4, a dedicated MIDI Merger/ Router module.
This versatile module, available in 2 sizes (standard case 200 x 100 x 42 mm or the 19" version with 1 HU), was equipped with 4 MIDI inputs and 4 MIDI outputs on the backside.
It did not have an on/off switch, and had to be powered by an external power supply.
Inputs and outputs could be easily assigned in any combination.
If you'd assign multiple inputs to a single output, the signals got merged.
The routing was set with 8 buttons and 8 LEDs at the front panel that were assigned to the 4 MIDI inputs and outputs.The MMR4/4 had 4 non volatile memories (Presets) to store 4 different matrix configurations.
The LEDs displayed the input/output configuration and could be changed very easy with the corresponding buttons.
During normal operation (monitor mode) the LEDs displayed the MIDI activities on the inputs and outputs.
A panic button was available transmitting "all notes off" on all channels and outputs if activated.
Around 600 of these units were made until they stopped selling the last ones in March 2001
There are no plans of a re-release of this module.
Find out more in the online manual HERE
Monday, June 04, 2012
Doepfer A-172 Max/Min patches by Pete Shambler
Pete Shambler has made a nice video demonstrating the Doepfer A-172 Minimum/Maximum Selector module.
In the video he shows some of the ways he tends to use it... pretty interesting...
" Five quick patches with the Doepfer A-172 Max/Min utility module. The first three are in stereo, so headphones are recommended!"
More info at http://www.theshamblers.blogspot.nl/
,and find more about the A-172 HERE
In the video he shows some of the ways he tends to use it... pretty interesting...
" Five quick patches with the Doepfer A-172 Max/Min utility module. The first three are in stereo, so headphones are recommended!"
More info at http://www.theshamblers.blogspot.nl/
,and find more about the A-172 HERE
Friday, June 01, 2012
New Doepfer Re-Designs Due to CA3080 Shortage
This time the problem is the availability of CA3080 (and 3080E) chips.
The CA3080 (datasheet PDF) is a 2MHz Operational Trans-conductance Amplifier (OTA), which is used in quite a few Doepfer (and other brands) modules and there seems to be no direct replacement equivalent.
The original chip itself hasn't been produced since 1975 and the wafers have all been used up a couple of years ago, according to some sources.
The CA3080 (datasheet PDF) is a 2MHz Operational Trans-conductance Amplifier (OTA), which is used in quite a few Doepfer (and other brands) modules and there seems to be no direct replacement equivalent.
The original chip itself hasn't been produced since 1975 and the wafers have all been used up a couple of years ago, according to some sources.
No-one seems to have decent stock anymore, and there was a buying craze when it went out of production.
That does mean that some Doepfer modules have to be re-designed in the near future because of this obsolete integrated circuit ( like the A-107, A-116, A-127, A-130, A-131, A-132-1, A-141, A-142-1, A-147, A-171).
This will take a lot of precious time for Doepfer that would otherwise be spent on manufacturing new modules.
Sadly these re-designs will not have any obvious benefit for the customers.
Thursday, May 24, 2012
A-127 Triple VC Resonance Filter Videos by Raul Pena
Raul Pena (from http://raulsworldofsynths.com/ ) has published the four A-127 Triple Voltage Controlled Resonant Filter tutorial demo's.
As most of you already know, this is one of my most favorite Doepfer filters, see more of my posts about this module HERE, so i was kinda looking forward to these video's.
Video 1: Doepfer A127 VCRF Triple Voltage Controlled Resonant Filter Part One-Introduction
" Description and Demonstration of the Doepfer A127 VCRF Triple Voltage Controlled Resonant Filter.Focus on Basic Features. One of four videos. Next in series Modulation.
Audio Loops by Raul Pena.Sound and Video by Raul Pena."
Video 2: Doepfer A127 VCRF Triple Voltage Controlled Resonant Filter Part Two-Modulation
" Description and Demonstration of the Doepfer A127 VCRF Triple Voltage Controlled Resonant Filter. Focus on Modulation of Resonant Filters. Number Two of four videos. Next in series More Modulation.
Audio Loops by Raul Pena. Sound and Video by Raul Pena."
Video 3: Doepfer A127 Triple Voltage Controlled Resonant Filter Part Three-More Modulation
" Description and Demonstration of the Doepfer A127 VCRF Triple Voltage Controlled Resonant Filter.Focus on Modulation of Resonant Filters by Sample and Hold.
" Description and Demonstration of the Doepfer A127 VCRF Triple Voltage Controlled Resonant Filter.Focus on Audio Rate Modulation of Resonant Filters.Demonstration of audio distortion with the A127.Number four of four videos.Audio Loops by Raul Pena.Sound and Video by Raul Pena. "
As most of you already know, this is one of my most favorite Doepfer filters, see more of my posts about this module HERE, so i was kinda looking forward to these video's.
Video 1: Doepfer A127 VCRF Triple Voltage Controlled Resonant Filter Part One-Introduction
" Description and Demonstration of the Doepfer A127 VCRF Triple Voltage Controlled Resonant Filter.Focus on Basic Features. One of four videos. Next in series Modulation.
Audio Loops by Raul Pena.Sound and Video by Raul Pena."
Video 2: Doepfer A127 VCRF Triple Voltage Controlled Resonant Filter Part Two-Modulation
" Description and Demonstration of the Doepfer A127 VCRF Triple Voltage Controlled Resonant Filter. Focus on Modulation of Resonant Filters. Number Two of four videos. Next in series More Modulation.
Audio Loops by Raul Pena. Sound and Video by Raul Pena."
Video 3: Doepfer A127 Triple Voltage Controlled Resonant Filter Part Three-More Modulation
" Description and Demonstration of the Doepfer A127 VCRF Triple Voltage Controlled Resonant Filter.Focus on Modulation of Resonant Filters by Sample and Hold.
Number Three of four videos. Next in series Audio Rate Modulation.
Audio Loops by Raul Pena. Sound and Video by Raul Pena."
Video 4: Doepfer A127 Triple Voltage Controlled Resonant Filter Part Four-Audio Rate Modulation
Audio Loops by Raul Pena. Sound and Video by Raul Pena."
Video 4: Doepfer A127 Triple Voltage Controlled Resonant Filter Part Four-Audio Rate Modulation
" Description and Demonstration of the Doepfer A127 VCRF Triple Voltage Controlled Resonant Filter.Focus on Audio Rate Modulation of Resonant Filters.Demonstration of audio distortion with the A127.Number four of four videos.Audio Loops by Raul Pena.Sound and Video by Raul Pena. "
Wednesday, May 23, 2012
A-116 Voltage Controlled Waveform Processor

After the input amplifier, the signal goes through two parallel processors: a clipping circuit, and an asymmetrical amplifier.
In a way you could see this module as a cut-down version of the A-137-1 that i reviewed in an earlier post.
Cut-down, but still very effective...
The processed signals are added together and sent to the output.
Clipping-Level and Symmetry amounts are manually controllable, but can also be modulated by control voltages like ADSR's, LFO's, Noise, etcetera.
It is a fun module to experiment with, although i haven't used it in a while.
Take a look at the video by Hawklord2112 that gives a nice impression of what this module can do.
Video: A-116 Demo
" basic functions of the A116 VC Waveform Processor from Doepfer. "
Find more of his videos at http://www.youtube.com/hawklord2112
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