A-100 analog modular Website
The Complex Envelope Generator is a very versatile modulation source. It consists of four AD envelopes (i.e. there are only attack and decay phases), which can be cascaded in any combination, trigger each other or be operated in an “LFO” mode. Due to the complexity of the circuit and setting options, the A-143-1 requires a … Read more
The module is no longer in production. The A-172 maximum/minimum selector leaves many “modularists” at a loss at first. A module that selects and makes available both the maximum and the minimum voltage from up to four input signals may appear too “mathematical” or intricate. In fact, the module is a surprisingly easy-to-use tool for … Read more
The A-154 Sequencer Controller can control one or two A-155 Sequencers and greatly expands their functionality. The connection between A-154 and A-155 is made directly on the circuit boards via ribbon cables. The clock signals of the A-154 and all control functions are transmitted here. A clock that can be synchronized and support for “16 … Read more
The A-152 Voltage Addressed Track & Hold / Switch module is by far the most flexible switching module presented here. It offers a bidirectional 8:1 or 1:8 switch that can be addressed via control voltage as well as switched sequentially via trigger signals (or switched back to the first level with a reset trigger). In … Read more
The A-143-9 Voltage Controlled Quadrature LFO / VCO is a voltage controlled sine wave generator that produces a very clean sine wave signal. With approx. 3 kHz, the LFO reaches into the audio range, with an additional control voltage it can even be used as a VCO up to approx. 20 kHz. Compared to “real” … Read more
(Almost) everyone has an A-140 ADSR Envelope Generator. For a good reason: the envelopes can be extremely “snappy” if necessary, but due to a three-stage “Time Range” switch very slow times are possible as well. The features of the module are solid and well thought-out standard: a gate and a retrigger input, three outputs for … Read more
The A-155 Analog / Trigger Sequencer is a well-equipped 2 x 8 step sequencer with three trigger tracks, one gate track and two control voltage tracks. Triggers 1 and 2 are always alternative, as are trigger 3 and the gate signal. Separate settings for “glide” (portamento) can be made for the two control voltages. In … Read more
The Quad VCLFO is actually almost a “real” VCO: It even has temperature compensation, which allows it to remain in tune even with external temperature fluctuations. Doepfer points out that the A-143-4 is not quite as accurate as the VCOs of the A-110 or A-111 series, but from my point of view it can be … Read more
The A-141-4 is a quadruple ADSR that is only 8 TE wide and is primarily intended for polyphonic applications. Therefore, there is only one set of controls for the envelope’s parameters – attack, decay, sustain and release, which affect all four envelopes equally. In addition, we find four control voltage inputs with bipolar attenuators for … Read more
