New Doepfer Custom Colored A100 Modules and Vintage Systems in Black Coming to NAMM

Doepfer will be at NAMM in Hall B, booth #5014. They will be showing these all black vintage Doepfer A-100 series systems and the following new modules.

"The custom version is only a design study made with a self adhesive foil printed by a color laser printer. There are no plans to offer this version of the module. But we plan to offer suitable templates for download. That way the customer is able to design "his" personal module by printig his design on an self adhesive foil and stick the foil to the module (for this the module has to be dismantled). Knobs in different colors are also available (please refer to the price list, section A-100 accessories)"

A-110-3 Triangle Thru Zero VCO

"A-110-3 is a Thru Zero VCO with triangle core. The term 'Thru-Zero' means that even 'negative' frequencies are generated. But this a bit a misleading term as negative frequencies do not really exist. "Negative" means in this connection simply that the triangle wave will stop when the linear control voltage reaches 0V and continue with the opposite direction as the linear control voltage becomes negative and vice versa."

A-110-6 Trapezoid Thru Zero Quadrature VCO

"A-110-4 is a Trapezoid Thru Zero Quadrature VCO. The module is based on an idea by Donald Tillman from 2003 but has been revised for the use of modern electronic circuits (no OTAs/CA3280). Because of it's unique trapezoid core it's totally different compared to other VCOs. But the trapezoid core is not the only specialty: it is also a quadrature VCO and features linear thru zero frequency modulation.

The term "quadrature" means in this connection that the oscillator outputs two trapezoid waves with 90 degrees phase shift. The same as sine and cosine of a standard quadrature oscillator. These waveforms are called TRASIN (trapezoid sine) and TRACOS (trapezoid cosine)."

A-121-2 12dB Multimode Filter

"Module A-121 is a voltage-controlled multi-mode filter with a cut-off slope of -12 dB / octave. Four simultaneous outputs are available, each with different characteristics: low-pass, band-pass, high-pass and notch (or band reject). The cut-off frequency determines the point at which the respective filter effects appear. The frequency can be adjusted manually, or by voltage control (Filter modulation, for instance by an LFO or ADSR). Two CV inputs are available, whose control voltages are summed. Resonance (Emphasis or Q ) can be adjusted manually, or by voltage control, right up to self-oscillation, in which case it will behave like a sine wave oscillator."

A-168-1 PWM Module

"Module A-168-1 is a pulsewidth modulation generator (PWM Module). It derives a rectangle signal with adjustable pulsewidth from an external triangle, sawtooth or sine wave. The external signal can be an LFO, VCO or any other signal with falling/rising slopes (e.g. ADSR). In addition the pulsewidth can be modulated by a CV signal (e.g. LFO or ADSR). The typical application is the generation of a rectangle signal with PWM from VCOs or LFOs which do not yet have this feature (e.g. A-110-4, A-145, A-147-2, A-143-4, A-143-9)."