Quotes VIII : Karlheinz Stockhausen

" ...being quiet and meditating on sound is something completely different and will be discovered very soon by a lot of people who feel that the visual world doesn't reach their soul anymore. "

Karlheinz Stockhausen - Composer
( 22 August 1928 – 5 December 2007 )

DIY A-180 2 x 4 Multiples Module

Unwired DIY A-180

Okay... Maybe not my smartest DIY-project, but at least i tried;
In one of my earlier posts about Doepfer's pre-punched blindplates i stated that you can easily make your own A-180 Multiples module, and save yourself a little bit of money by making your own.

That last thing is correct; it does save you some money (even a bit more if you shop around for components), but if you count the time putting the parts together you can ask yourself if it was also worth your precious time.

I did order a few of the 4HP width blindplates (punched for 8 socket / identical to A-180 front panel but without printing) and also ordered a bunch of sockets from Doepfer and just had to give it a try.

Mounting the jack sockets was simple though the pre-punched holes. Because i wanted it to be a 2 x 4 multiple i thought it would be smart to turn the both sets of 4 multiples in a different way for easy wiring and a certain balance. (but not really necessary)
The wiring was a bit harder. it's not easy to solder very short wires, especially for a beginner like me. It took ages for me to solder all the sockets together, but i finally got it together and the end result works fine. Be sure you leave no exposed wires on the back, a passive module like the A-180 cannot cause lot of electrical damage but can cause audio or CV 'leakage'.

But... was it worth the 10 Euro's that i  saved by buying the loose components?
For me it just wasn't, but i can image with even cheaper components and connectors or a piece of breadboard instead of soldered wires it might work for you.
Because i still have another pre-punched A-180 blindpanel i will also make the other one.

Not only to work on my soldering skills, but in my opinion you never have enough multiples.

The A-180 front panel without printing is available as a spare part. It can also be used for other DIY modules, for example as a connection unit for other modules that have to be controlled by the universal vactrol module A-101-9 .

Most Wanted - Future Modules Update

It is always good to keep an eye on the posts from the Doepfer Yahoo Usergroup.
Not only to get answer to all the A-100 questions you have, the DIY-tips, and the interesting module discussions but also for Dieter Doepfer's own input, troubleshooting and the occasional company updates.
In one of his latest posts he announced a few interesting 'new' things on Doepfer's to-do list, including a few that are not yet on Doepfer's Future Module page.

The ones you can already find on that page are the A-190-5 polyphonic USB/Midi-to-CV/Gate interface, the A-142-4 Quad Decay, A-195-1 Pitch-to-CV/Midi/USB interface, A-192-2 CV/Gate to Midi interface, A-143-4 Quad VCO/VCLFO and the A-100 touch keyboard.

The original A-126(-1)

I already blogged about the forthcoming A-157 Trigger Sequencer (not much info on the Doepfer site, only in a NAMM 2010 brochure), but the update of the A-126 module was new for me.
The A-126-2 Frequency Shifter II will be a redesign of the old module. 

Because of availability of the special circuit CEM3382 used in the original module's internal quadrature VCO, the 'original' A-126 is no longer available and they had to stop the production of this module. 

It looks like Doepfer is now working hard on a succeeding model without an internal VCO.

Other modules that were mentioned were a VC Slope Generator ( no specs or further info available, but maybe something like the Serge Universal Slope Generator ?- i'm only guessing !), a Master Clock module/synced LFO, the A-100 bus board V2 with some Analoge Systems connectors ( no more Analogue Systems-to-Doepfer adaptors necessary? ), and an A-100 miniature power supply redesign 

Besides that, Dieter posted that they are also still working on various non-A-100 Doepfer products like the Dark Matter (Dark Energy expander with Noise, S&H, a second VCO, Multimode-VCF, additional waveforms and maybe some other effects), the Dark Link, and an expansion board for the DIY Synth. 

" ... still on our to-do list. But I can't say in which sequence the planned products will be released."

Note: Please don't call or mail them too often at Doepfer about release-dates or updates of future modules. The Doepfer website is updated very regularly, so you will find all the latest info there...

Using the A-100 for Sound Processing

A-119 External Input /
Envelope Follower

The A-119 External Input / Envelope Follower module allows you to integrate any audio signal (electric guitar, microphone, midi sound module, computer sound card, CD player, tape-recorder ...) into your A-100 system.

Audio inputs of audio-processing A-100 modules (e.g. filter, VCA, phaser, flanger, waveform processor, distortion, wave multiplier, ring modulator, frequency shifter, spring reverb, panning ...) all require line level signals of around 1Vss. , and if the signal source does not have the required level an external pre-amplifier like the A-119 is recommended. 

This module consists of a (pre-)amplifier, an envelope follower and a comparator.

The pre-amp has 2 inputs, one unbalanced (Asymmetric) for line level signals, and a balanced (6.3mm jack /Symmetric) input for inserting low level signals, like microphones or electric guitars.
The module provides two simultaneous audio outputs of the amplified signal.

The envelope follower 'reads' an incoming audio-signal and sends out a proportional voltage as an envelope to its own output.
The brightness of the LED indicates the envelope output level, which is very useful...

The voltage at the output signal can be used to control the filter frequency, loudness or any other voltage controlled parameters such as filter resonance, LFO speed, clipping level, wave multiples, frequency shift, phase shift, delay time and more...

The comparator generates Gate signals out of the incoming signal.

Whenever the audio input exceeds a certain (adjustable) level, a Gate-signal is produced.

This signal can again be used to trigger various other external modules like envelope generators or even voltage controlled switching.

Again, this is a very useful module that i cannot do without anymore because i often use external audio inputs. Most of the times i have a microphone plugged in for vocoder use or for filtering pleasures, but i have used it with my guitar and other audio too.
I do find it a bit strange that it is not included in one of Doepfer's pre-configured basic systems, for me it was a must-have.

One Year www.PatchPierre.net

Wow... time flies.

Today exactly one year ago I started to write this blog, mainly because i could not find a lot of Doepfer user-info on the web. I was looking for a way to share my adventures in analog sound with others, and i looks like i found the right spot.
Sadly i don't have any budget for a give-away (like the wonderful Din Sync blog did) to thank you for visiting/ commenting/ interacting but i do appreciate all your input in this first (and certainly not last) year.

A few statistics:

- A total number of 1000 unique visitors have visited this site so far
- Those visitors came from 77 different countries

- Coincidentally today the site passed the 6000 pageviews too.
- Last months the site has an average of 1000 pageviews per month (but that includes my own too)
- About 30% of the unique viewers are from the USA, The Brits and the Dutch share a second place with around 10% of the total unique viewers each.

Very different are the numbers of my PatchPierre Mobile Nokia application users. Sadly this app doesn't generate an extreme lot of traffic to the actual site, but it did generate around 5% extra visits.

4592 people have downloaded and installed the application so far.

Most of the downloads happened in the counties where Nokia Symbian is a big platform, so most of them happened in India (1067 downloads - 23%), Saudi-Arabia (274 downloads - 6%),Turkey (5.3%),Brazil (4.7%) and Italy (4.3%).

Interesting to see that counties like the USA, Great-Britain and the Netherlands even had less installs than countries like Egypt, Thailand, Indonesia, Russian Federation, Libya, Vietnam and Mexico, to name a few 'odd' ones.*

A lot of them probably used it only once to try it out, but there is a steady group that keeps using the app., around 75 people each month.

So, if you read this blog on your Nokia app, feel free to click through to the real site if you don't want to miss any of the links.
Let me know if you would like to have a Nokia app for your own Blogspot blog... I have two apps in the OVI appstore already, and it is definitely worth it.

There will be a couple of changes to the blog in the next few months. Due to my work i will have less time for the blog again this spring/ summer. I will not post every three days, like i did last 4 months, but i will try to post more than weekly. There are still plenty of modules to write about, and i believe i can't really write about the ones i haven't tried out by myself, but there's still enough stuff to come.
Let me know if you have special requests of topics that you would like to see discussed on the blog. Your input is always welcome, and i hope you will enjoy reading the blog in the next (few) year(s).

My Wordle of one year in Tweets, via http://tweetstats.com

* PatchPierre Mobile stats provided by @wonderhelm

Quotes VII : Herbie Hancock

" Creativity shouldn't be following ratio, it should be the other way around. "

Herbie Hancock - musician, composer, bandleader

Controlling the A-100 via MIDI

In the beginning it was not difficult to pick a Doepfer MIDI-CV interface for your A-100 system.
The A-190 MIDI-CV/SYNC Interface was the only one available and there were not many other options.  (the A-191 MIDI-to-CV Interface / Shepard Generator was way more complex, i will discuss it in a future blogpost).
The A-190 is a powerful module that not only provides a few CV and Gate outputs, but also Portamento, Scale-settings, Pitch-bend, Glide, Clock and Reset signals, has a built-in (software) LFO and very flexible programmability.
Without a proper display it is quite awkward to program, but you'll quickly learn how to read the combinations of burning and flashing LEDs.
I do miss some further (software) development for this module. The arpeggio function, mentioned on the front-plate isn't even implemented (!)

A cheaper option that you can buy nowadays is the  A-190-2 Midi CV/Gate interface, which is based on the Doepfer MCV4. Only some minor changes were made for a better adaption to the A-100 system, e.g. five 3.5 mm sockets and zero-symmetrical CV for pitch bend, to be able to adjust the pitch bend range e.g. in combination with the precision CV adder A-185-2 and the glide function.
The module has no MIDI Thru and MIDI clock and reset functions though.

The new A-190-3 USB/MIDI-to-CV/Gate Interface that is in production stage has almost the same possibilities, but will be a modular version of Doepfer's upcoming Dark Link Module. This one will support USB and the release date for it is set for early 2011.
Another advantage of these two cheaper modules is that they don't need the additional +5V adapter. 

If you are looking for a polyphonic MIDI-CV contoller you will probably have to wait a while. Doepfer is busy working on the A-190-5, but it will be completely redesigned this year. A final version will  probably contain an LC display (similar to the A-187-1), some control buttons, a USB interface and higher resolution DACs with higher voltage range (probably 12 bit and 0...+10V). It will be a four voice polyphonic Midi to CV/Gate interface with 12 CV and 4 Gate outputs and different modes (e.g. unisono, four-fold monophonic, different four voice polyphonic modes.)

Tip: The monophonic MIDI-CV converters can write and read to the A-100 Busboard, more info on this HERE