Skip to main content


Showing posts from May, 2015

Doepfer A-166 Dual Logic Video Tutorials by Raul Pena

Raul Pena just published the first tutorial video on the Doepfer A166 Dual logic module.

The A-166 is a Dual logic module with 3 inputs for each unit.
The logical states of the inputs ("1" = high / "0" = low) are linked together in 3 ways: AND, OR, EXOR (exclusive OR). The three functions are available simultaneously at three outputs with LED display of the output states.

Additionally two inverters are avaliable to obtain the inverted functions NAND, NOR and NEXOR.
The sockets of each triple unit are "normalized", i.e. the switched contact of socket 2 is connected to input 1 and the switched contact of socket 3 is connected to input 2.
Provided that no plug is inserted into socket 1 resp. socket 2 the socket is connected to the input above it.
This simplifies the usage of the module when only 2 signals are combined. E.g. the logic functions AND and OR have different neutral input levels ("1" is the neutral state for AND, "0" is the …

Colored Doepfer Knobs

Yay... Doepfer decided to produce and sell knobs in multiple colors.
The modules are still delivered with grey knobs.
Because of logistic reasons it's not possible to deliver modules with different colored knobs, but the customer is able to order the knobs separately and replace the grey knobs by the new ones as the knobs are simply plugged on the potentiometer shafts.

The colored rotary Knobs, diameter 15 mm, height 15 mm, for 6 mm axis with 18 teeth, can be used also in other products like MAQ16/3, Dark Energy or Dark Time.

You can find the new knobs on the price list in the Doepfer website's spare parts section...

Doepfer A-111 High-end VCO 2 Video Tutorials by Raul Pena

For his next Doepfer tutorial video series, Raul Pena returns to the classics...
Module A-111-1 (VCO2) is a voltage controlled oscillator.  The VCO has a range of about 12 octaves, and produces four waveforms simultaneously: pulse (rectangle), sawtooth, triangle and sine waves.  The VCO's frequency is determined by the position of the range switch, tune and fine tune controls, and the voltage at the two pitch CV inputs, CV 1 and CV 2. Footage (the octave of the fundamental) is set by the Range control, which has seven octave steps.  The Tune control is used for coarse tuning, and the Fine control for fine tuning of the VCO pitch. 
The A-111 can be modulated by both exponential and linear FM (frequency modulation).  You can control the pulse width of the square wave either by hand, or by voltage control - Pulse Width Modulation, or PWM for short.
The A-111 also has inputs for Hard Sync and Soft Sync.

As the special circuit CEM3340 used in this module is no longer available the module…