Friday, March 21, 2014

More A-190-4 MIDI-CV/Gate/Sync Interface Specifications

Last year, quickly after the A-190-4 prototype suddenly appeared in the wild, i already contacted Dieter Doepfer about some of the specs of the module.

The Doepfer A-190-4 will be the new replacement for module A-190-1 which is no longer available.
The functions of A-190-1 and A-190-4 are nearly the same (Midi In, Midi Out, CV1, CV2, Gate, Clock, Reset), but the operation of the A-190-4 has been improved because a 3-digit LED display is available.

The current values of all parameters (like Midi channel, reference note, clock divider) can be read back and modified by means of up/down buttons.
In addition A-190-4 is equipped with an USB interface and the external +5V supply is no longer available.

A-190(-1)  MIDI-CV/Sync
Interface
The A-190-1 has 2  DACs (Digital-to-Analog Converters)
In the original A-190-1 DAC 1 is 'hard-wired' to receive MIDI note messages and convert them into control voltages available at CV output socket CV 1. This DAC has 12-bit resolution, which gives excellent tuning resolution (in steps of 1/4096th). As a rule, DAC 1 will be used to control VCO pitch.
DAC 2 can be assigned to your choice of MIDI controller. This DAC has 7-bit resolution (1/128th steps).

At the time (almost one year ago) Dieter couldn't tell much about the processing power and if any other functions would be available (arpeggiator? like the A-190-3), but this week I have managed to get a bit more info.
Christian Assall, software developer at Doepfer, was kind enough to explain a few more things about the A-190-4 via e-mail:

A-190-4 Prototype
- "The A-190-4 will have 2 new DACs... Because the development of the A-190-1 was now before more than 15 years, it makes sense to use modern pieces."

- "DAC2 will now also be 12 bit and will have a range of 0 ... 10 + volt ( but can also only use it for velocity/controller and things similar to the A190-1 , but not for pitch/tune controlling like the CV1 - so it's not possible to control two voices - because you also have only one gate ;-) - for polyphonic things we have the A190-5 in development"

About future firmware updates:
- "As the next development in schedule list is the A-190-5 - which is something like a 'great' brother of the A-190-4 - the A-190-4 has in most cases the possibility to inherit his features...
...so it's more a question of what we and the users want and decide to include in a preferably easy to use CV-interface the A-190-4 should be... This also belongs to the topic arpeggiator."

The A-190-1 Arpeg. mode never got released 
About the somewhat hidden arpeggiator-function in the A-190-3:
- " It's more a cost-free present or an eastern-egg like thing than a real feature in my eyes, because it hasn't any dedicated switches or display for that - so I think it's for many users hard to use ...
But if you can - sure you can use it and you can do some arp. things without any additional devices/software ...."

- " We never released this feature in the A-190-1, mostly because of the not optimal user interface, that was not suited in our eyes for additional and such a complex features.
An arp. should have a dedicated/suitable user interface - otherwise it didn't make much sense in my experience/eyes.
Sure also the weak processor power was a reason, not to try with many tricks to get an arp. which is in timing and didn't interfere with the other functions of the module.
So, never to release, was more a matured consideration that came from practical experiences..."

The A-190-1 will be replaced by the A-190-4 from about April 2014.
As of April, the Doepfer BS basic systems will come with an A-190-4 installed...

Thursday, March 20, 2014

ALEX4 with Andreas Schneider: the Lightning Tour Messe '14 by cdmblogs

CDMTV uploaded a video with Andreas Schneider presenting a tour through the Alex4 booth at MusikMesse 2014...

Video: ALEX4 with Andreas Schneider: the lightning tour Messe '14

" The legendary Andreas Schneider of ALEX4 (and Schneidersladen) gives us a rapid-fire tour of the latest and greatest goodies in his Messe booth. Like a tradeshow in a tradeshow, this is some of the best new stuff happening in boutique musical instruments right now."

Uploaded by cdmtv
Berlin, Germany and worldwide · createdigitalmusic.com

Wednesday, March 19, 2014

Intro to Eurorack Modular by @Flux302

Ken Flux Pierce (@Flux302) had been getting a lot of questions about getting into eurorack, so he did an article and a video on what he has found so far.
The full article can be found at http://fluxwithit.com/intro-to-eurorack-modular/
He will be updating the article and adding to it with both videos and written chapters.
Here is the first video:

Video : Intro to Eurorack Modular Synths from Fluxwithit.com

" This is just simply a primer to get people a little bit of info on what eurorack is. How to get started, and what some of the key elements are.Visit Http://Fluxwithit.com for more info! "

If there is anything in correct or you feel he should touch on,
feel free to let him know via http://fluxwithit.com/intro-to-eurorack-modular/

Tuesday, March 18, 2014

MusikMesse 2014 Alex4 Booth with Dieter Doepfer

Once again, SonicState has made a nice video from the MusikMesse booth of European Distributor of analog synths and Eurorack modules Alex4.

Alex4 Booth, picture by Marko Ettlich
The Alex4 Distribution booth with the big tagline "...you like Synths?" included MFB, KOMA, Doepfer, and Meeblip anodes, amongst other smaller (European) brands.

The SonicState booth-tours are almost an annual ritual, often with owner Andreas Schneider (from SchneidersBuero /SchneidersLaden) showing the whole booth and some of the new goodies...
This time Dieter Doepfer shows the new stuff, focussing on the Dark Flow, the stand-alone version of the A-157 Trigger Sequencer (Mini Schaltwerk) and some of the OEM/DIY products.

Video: MESSE 2014: Dr Doepfer's Dark Flow

" MESSE 2013: Dr Doepfer's Dark Flow - Astronomy inspired trigger sequencer "
Uploaded by

Another nice Alex4-booth impression by Dutch Interface Magazine also popped up on YouTube:

Video 2: Musikmesse 2014 vol 5: Alex 4s Do You Like Synths?

Video uploaded by InterfaceNLvideo

SiteTip: Modular Sub-Reddit

In case you didn't know already:

The Modular Sub-Reddit is an extremely valuable source of all kinds of (Eurorack and other) modular news, videos, tips and tricks...
Besides that it is also a nice discussion platform that can always use more participants.

Find it at http://www.reddit.com/r/modular/

The community doesn't seem very talkative so far (which is strange for modular lovers), so please subscribe, vote articles up or down, join the discussions and add your own links...

Thank you in advance for your help and input!

Find more PatchPierre SiteTips HERE

Friday, March 14, 2014

Musikmesse 2014 Introducing New Doepfer Modules by AnalogueZone

AnalogueZone has made a nice impression of the Doepfer booth, with Dieter Doepfer himself telling all about the new modules...

Video: Musikmesse 2014 Introducing new Doepfer modules

"Analogue Zone Modular Synth Store presents:
Dieter Doepfer introduces his new modules at Musikmesse 2014;
Doepfer A-190-4 USB/Midi-to-CV/Gate/Clock Interface

Thursday, March 13, 2014

Doepfer A-125 Voltage Controlled Phase Shifter Video Tutorials by Raul Pena

Raul Pena just posted a new tutorial video in his Doepfer Series, this time all about the Doepfer A-125 Voltage Controlled Phase Shifter.
Here's part one, enjoy!

Video : Doepfer A125 Voltage Controlled Phase Shifter Basics

" A short overview of the basic features and functions of the Doepfer A125 Voltage Controlled Phase Shifter. Sound and Video by Raul Pena. "

Video 2: Doepfer A125 Phase Shifter Audio Demonstration Part One

" A short audio demonstration of the basic functions of the Doepfer A125 Phase Shifter. Includes oscilloscope views. Sound and Video by Raul Pena."

Video 3: Doepfer A125 Phase Shifter Audio Demonstration Part Two
" A continued exploration of the Doepfer A125 Phase Shifter. More sound examples of the Phase Shifter. Sound and Video by Raul Pena."

Video 4: Doepfer A125 VC Phase Shifter Modulation Part One

" Further exploring with the Doepfer A125 VC Phase Shifter. Examples of basic modulation with an envelope and LFO.Sound and Video by Raul Pena."

Video 5: Doepfer A125 VC Phase Shifter Modulation Part Two

" Further exploring with the Doepfer A125 VC Phase Shifter. Examples with Random, Noise and sample and hold.Sound and Video by Raul Pena."
New videos in this series will be added to this post weekly on Thursdays.

Check out Raul's latest survey at http://www.surveymonkey.com/s/K3Z9PVF
Other places to find Raul's World of Synths on the Web:

Wednesday, March 12, 2014

Random Video: Epoch Modular 'Benjolin' with Doepfer A-143-9 and A-135-1 by isvisible

Another nice Eurorack video by isvisible popped up on Vimeo today:

Video: Epoch Modular 'Benjolin' with Doepfer A-143-9 and A-135-1
Epoch Modular 'Benjolin' with Doepfer A-143-9 and A-135-1 from isvisible on Vimeo.
" I wanted to make a video showing off the many facets of the Benjolin, but got carried away with it and only covered a little bit.
There were only three modules used... an Epoch Modular version of the Benjolin (originally designed by Rob Hordijk), and two Doepfer modules, an A-143-9 Quadrature LFO which is modulating the VCA's in the A-135-1 Quad VCA / VC Mixer.
The A-143-9 is in turn being modulated by the Rungler out on the Benjolin.

Four audio channels were taken from the Benjolin and into the Quad VCA.
1 - LPF.
2 - XOR.
3 - HPF
4 - PWM
There was slight panning of the four channels in my mixer (Output 1 slight left, to output 4 slight right) then recorded with no external effects or any additional modulation."

For more info on the Benjolin by Epoch Modular please visit epochmodular.net/benjolin.html
Find music by isvisible at:

Tuesday, March 11, 2014

Modular Wild Presents Maths Minute - Maths as Logic/Voltage Inverter

Raul Pena just released a new video today. this one is an unreleased MATHS Minute, featuring the MakeNoise Maths module...

Video: Modular Wild Presents Maths Minute-Maths as Logic/Voltage Inverter

"A timed exploration of the Maths as a Logic/Voltage Inverter patch found in the Make Noise MATHS manual.Sound and Video by Raul Pena.
Special thanks to Tony Rolando at Make Noise.© 2013 Raul Pena "

Find earlier episodes of Math Minute on Raul's YouTube page HERE (Playlist)

Monday, March 10, 2014

Doepfer A-101-6 Six Stage VC Opto FET Filter/Phaser Announced

Another new module announcement from Doepfer.

" A-101-6 is a new filter module that uses so-called opto FETs to control the filter frequency.
A-101-6 Six Stage Opto FET VCF
Opto FETs are very similar to Vactrols but use light depending field effect transistors (FETs) instead of light depending resistors (LDRs).
A Opto FET is a combination of a light depending FET and a LED (light emitting diode) both put into a small light-proof case.

The advantage compared to vactrols is the much faster response of opto FETs compared to LDRs. 
This allows much faster attack/decay times and even FM effects. 
The disadvantage compared to vactrols is that the FET behaves as a normal Ohm resistor only for small levels. With higher levels the FET begins to distort.
Apart from this the notes mentioned on the Doepfer Vactrol Basics page are valid.

Module A-101-6 is made of six serial 6dB filter stages. The stages can be switched simultaneously to lowpass, highpass or one of two allpass types.
The following schematics show one of the six serial stages in the four possible modes:

A-101-6 Principle Schematics
The variable resistor shown in the schematics corresponds to the opto FET.
The type of filter is selected by two toggle switches or 2 control inputs.
The upper switch selects between lowpass and highpass provided that the lower switch is in the LP/HP position.
When the lower switch in the AP (allpass) position the upper switch is used to select between the two allpass types. Instead of the switches even external control voltages can be used (CV LP/HP, CV Allpass sockets).
For this the toggle switch in question has to be in the left position.

The brightness of the Opto FET LEDs and consequently the filter frequency can be adjusted manually (Frequ. control) and controlled by means of an external control voltage (CV) with attenuator.
The LED at the front panel reflects the LED brightness inside the opto FETs.

The resonance is controlled by the Feedback control up to self oscillation. By means of two trimming potentiometers the maximal feedback can be adjusted separately for LP/HP and allpass mode.
High feedback values can be used mainly in the allpass mode to obtain very extreme self oscillation sounds. Even an external feedback signal can be used instead of the internal feedback connection (FB In socket).

The Mix control is used to pan between the original signal (CCW position) and the effect signal (CW position).
In filter mode (LP/HP) this control is usually set fully CW.
In the allpass modes one obtains phasing sounds at center position or "pure" allpass sound in fully CW position."

Update May 6th 2014:
" thank you for your interest in the planned module.
Because of several suggestions by customers there will be probably some additions (like voltage
controlled dry/wet mix and maybe voltage controlled resonance/feedback).
So it will still take some time until the module is available.
An experienced A-100 user is currently about to try out the prototype (still without the additional voltage controlled features) and we wait for his assessment about the features of the module before we continue.
If the module is back I can do some demos." *source Dieter Doepfer

Release date and price for this module are not yet available.
Source: http://www.doepfer.de/a1016.htm
Read more about Opto-Isolators at http://en.wikipedia.org/wiki/Opto-isolator
and more about Vactrols at http://patchpierre.blogspot.nl/2011/02/vactrol-basics.html

The new Doepfer modules will be shown at #MusikMesse in the booth of their distributor Alex4 in hall 5.1, booth nr. C54