The Doepfer module A-175 has been discontinued.

Module A-175 (Dual Voltage Inverter) is exactly what it says it is: two identical inverters, which will take a voltage and output it in an inverted form - so that an input of +5 V will be output as -5 V, an input of -2 V will be output as +2 V, and so on. Two LEDs give a visual indication of the (positive or negative) output signal.

Sale while stocks last !

Where's the joy in modular synthesis if you can't perform surgical operations on living, screaming electrical signals?

Vivisect is a deceptively simple module designed to attenuate, invert and sum four inputs to two outputs. Each input has its own output, and all channels are DC coupled.

An additional circuit gives you a separate offset between +/-5V from a precision DC reference. This offset can be switched in and out of the mix as required using the offset push-button. The mix output has a second output that is an inverted copy of itself. All outputs are independently operable. 

Last but not least, a white noise generator completely separate from the mixer circuit gives you about 10V of white noise to calm your nerves, confuse your pet or make hi-hats with.

As an added bonus, jumpers on the back of the module allow you to normalize Input 1 to any or all of the other three inputs. Using this, you can self-patch the module to create e.g. 4 channels of noise or offset.

Whether you're new to voltage surgery or a professional patcher, the Vivisect module is designed to be anaesthesia-free fun for the whole family!

Online with Facebook Live!

In this episode, Modularsquare teleports to Brittany to Gaël Loison of Touellskouarn to talk about his modules and his multiple musical projects.

The event will take place on Facebook on Friday, March 12 at 9:00 PM UTC+01.

Now available as a free download: Andreas Krebs, Das große Buch zum Doepfer A-100 Modulsynthesizer

The book: All current A-100 modules are described systematically and in detail. In addition, many unusual patches "from the bag of tricks" are presented (illustrated in colour throughout). Sound generators - filters - unusual sound benders - modulators - everything for amplifying, mixing and splitting sounds - manipulating triggers - cabinets. Especially for beginners: basics of modular systems, connections, overview of all filters and their differences, how to turn a low-pass filter into a high-pass filter, example systems for different purposes, etc. Especially for advanced module users: Unusual modules and their possibilities - e.g. how a flexible waveshaper can be built from a max/min module, how a comparator transforms oscillations, what a polariser has in common with a ring modulator or why an oscillator can also simply sing along with you.

The author: Andreas Krebs has been working with analogue (and other) synthesizers for about 30 years. After graduating in psychology, he has been working in the IT field for many years. Andreas composes and improvises strange music.

Our opinion: The book describes all modules very competently and in detail (as of 2011) and was designed by the author with a lot of devotion to detail. Highly recommended !

The book is out of print, but the author kindly offers it for free download:

http://www.a100.ideenhase.de/Krebs_Doepfer_A100_small.pdf.

Further information is available at www.ideenhase.de