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Doepfer A-150-8 Octal Manual/Voltage Controlled Programmable Switches Announced

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Doepfer A-135-4A/B/C Voltage Controlled Performance Mixer Modules Announced

In a previous blogpost I was rather excited about my own new A-138p/o Performance mixer combo.
I bought i just right before I knew that Doepfer was working on a voltage controlled version of this module...

On first impression, the new A-135-4A Voltage Controlled Performance Mixer looks quite the same as the non-cv-controllable A-138p Performance Mixer, only with extra LEDs for displaying the incoming CV voltages for all parameters (except Gain).

Module A-135-4B is the CV-input module, where 16 different control voltages can alter 16 parameters on the A-135-4A Mixer... The modules must be connected via an int 20pin ribbon-cable.

Module A-135-4C is a four-fold envelope follower with adjustable attack and release time for each channel.
The main function of the module is to derive four envelopes from the A-135-4A audio input signals. These voltages can be used to control parameters of the main module A-135-4A via the CV input module A-135-4B2. Typical applications are ducking (e.i. the s…

Doepfer A-138p/o Performance Mixer Combo

The latest addition to my modular system is the A-138p/o Performance Mixer set of modules...

Modules A-138p/o are a simple performance mixer that I use as and end-mixer for all the signals coming out of my A-100, and for merging my TB-303 audio, before it all goes into my mixing-desk.

Module A-138p is the 4-fold input module, A-138o is the output module that can be combined with one or more A-138p.
I read somewhere that the module didn't start off as commercial product, but as a personal hobby-project of Dieter Doepfer who just needed this module for himself... It did go through quite a few prototype stages before it was released in this final form.

The A-138p has 4 input channels, with separate controls and a mute
switch for each channel.
The controls are for Gain (control to adapt different audio levels -also for external signals), Level (the main volume control), Aux and Panning
An internal jumper for each channel lets you choose between Aux pre/post main Level control.
There …

Happy New Year From PatchPierre

Hi there, it's me again... Happy New Year!

You might have noticed that I havent posted a lot in the last 2 years...
It's been a rough time for me since the sudden loss of two parents within a relatively short time-span and I really needed some time to get myself together... to set things straight, finding myself and selecting priorities... even my regular work suffered from this breakdown.

It took a while to understand it all, and to get a better grip on it, and it's sometimes still not very clear.
I think I have found a way to cope with most of it now... although the slight autism that I have (ADD-like) doesn't make it easy for, especially in crowds with lots of people I don't know...
On my journey I also (re-)discovered the beautiful woman that has always lived inside of me and that i need to accept and cherish... more on that maybe later... I'm not considering changing the name of the blog to PatchPetra.Net 😇 (...yet), but you might spot me somewhere at mod…

Livestock Electronics at ADE SoundLab

It's always fun to meet new Modular manufacturers, especially when they're from the Netherlands
and/or Belgium.
Last Saturday i had the chance to talk with Daniel Mulder, one of the co-founders of LiveStock Electronics at a special Amsterdam Dance Event SoundLab showcase event.

Livestock Electornics was founded in early 2016 and is about to release their fist modules at the end of this year. Their modules are heavily inspired by the chiptune and DIY-scene, and Daniel showed off a few interesting sounding new modules... you can find all info on their website.

The SHEPARD is a 4-channel step sequencer specifically designed for live settings.
This module is great for polyphonic and polyrhythmic sequences. And has a lot more to offer than just triggering notes and gates!
The interface is divided into two modes, play and edit mode. In play mode loops of several channels can be selected at the same time, and easily duplicated. While edit mode gives you the possibility to create …

Doepfer A-184-2 Voltage Controlled Crossfader / Triangle-to-Sine Waveshaper

More News fom the Superbooth event in Berlin (March 31st - April 2nd, 2016)

The A-184-2 Voltage Controlled Crossfader / Triangle-to-Sine Waveshaper is the combination of two functions and planned primarily as an expansion module for VCOs or LFOs (e.g. A-110-1, A-110-2, A-145, A-147-2).
The upper section is a very precise triangle-to-sine converter (thank's to Tim Stinchcombe who recommended this circuit).
It can be used to convert any triangle waveform into a (nearly) perfect sine.  The converter is much better than the simple diode converter used in the A-110-1, A-111-1, A-145 and A-147-2.  Two trimming potentiometers are used to optimize the sine shape.  The converter should be assigned to one VCO or LFO because the trimming potentiometers have to be re-adjusted if the input level or DC offset of the input signal changes.  If the trimming potentiometers are deliberately mis-adjusted it can be used also as a waveshaper for non-sine waveforms (e.g. sine-shaped at the top of the sig…

New Doepfer High End VCOs A-111-2, A-111-3 and A-111-4 Thru-Zero Announced

Doepfer has announced two new High End VCO's at the Superbooth event in Berlin (March 31st - April 2nd, 2016)

The A-111-2 is based on the CEM3340 Rev G chip
There was a close cooperation between Doepfer and OnChip since 2015 regarding to the new re-issue of the CEM3340 and they received the first samples in January during NAMM for development.
The first production batch of the CEM3340 Rev G arrived 2 weeks ago and the production of the A-111-2 has started during the next few days (they are still waiting for the latest front panel and pcb samples). 
Doepfer expects the first modules to be finished around the end of July/August. 
The A-111-3 is also based on the CEM3340 Rev G ,and Doepfer is working on a Thru-Zero VCO based on the CEM3340 Rev G too (module A-111-4).

The Doepfer A-111-2High End Voltage Controlled Oscillator II is the successor of the obsolete High End VCO I A-111-1 and here are the most important features of the planned module:

Triangle core, min. 15 octaves pitch range (…