A-100 analog modular Website
Andreas Krebs The long-awaited polyphonic mixer A-135-5 is now finally available since the end of 2023. Yes, of course you could already make do with A-130-8 VCAs, for example. Some poly fans also installed a series of A-138n narrow mixers or A-138f dual crossfaders, but of course it wasn’t all that elegant. The A-135-5 mixer is elegant. … Read more
The A-190-5 is a Midi-to-CV/Gate interface primarily intended for polyphonic applications. This means that up to four modular synthesizer voices can be controlled via any midi keyboard. Polyphony is still a rather exotic “fringe phenomenon” in the modular area. Effort, cost and complexity to control such a system appear relatively high compared to modern analog … Read more
Four manual attenuators in a slim 4TE module. Ok, this is definitely not an exciting module with lots of bling and two dozen hidden features. This is a tool. Simple, clear, and once you have it – indispensable. For example, I have two A-183-1 Dual Attenuator Modules (now running out of stock modules) in my … Read more
The A-131 module is the “sibling module” of the A-130 VCA. In contrast to this, it works with an exponential characteristic, but is otherwise identical. This makes it rather unsuitable for amplifying control voltages, but in most cases it is very suitable for amplifying audio signals. User interface Inputs: Outputs: Controls: A slightly “coloring” VCA … Read more
Like its predecessor A-121, the A-121-2 filter is a multimode filter with 12dB slope that offers separate outputs for highpass, lowpass, bandpass and notch (bandstop). Technically, the filter is a direct offshoot of the “Dark Energy II” synthesizer, which basically uses the same circuitry. How does it sound? Fine, round, pleasant and in terms of … Read more
The A-120 module is – the name “Low Pass 1” suggests it – something like the “mother of all Doepfer filters” (from a historical perspective, not from a technical perspective). The circuit is based on the famous 24 dB Moog transistor cascade (“ladder” filter). And this is actually the official mother of all synthesizer filters. … Read more
The idea of running an audio signal such as vocals or drums through a modular system is always popular – with hopefully musically usable output. In addition to the often heard filtered drums, you can of course do a lot of creative things this way. The A-119 module performs several tasks: User interface Inputs: Outputs: … Read more
It’s hard to imagine even more VCAs in a small space than the A-130-8 allows. No fewer than eight independent, linear VCAs are housed here in just 6HP. And because there was still some space on the front panel, there are also sum outputs for inputs 1-4, 5-8 or for all inputs 1-8 together. So … Read more
The A-111-5 is not an oscillator in the traditional sense, but a complete mini synthesizer with VCO, VCF, VCA, ADSR and two LFOs. A “Dark Energy” (first generation) for the modular system! A lot of things here are patchable, but upon closer inspection you’ll see that some signal paths are exclusively internal. For example, there … Read more
The A-130 Voltage Controlled Amplifier is a (very well-equipped) linear VCA. The “sibling module” A-131 works with exponential characteristics, but is otherwise identically equipped. It has already been shown with the mixers A-138a (linear) and A-138b (exponential) that an exponential characteristic of the amplification comes closer to our psychophysiological feeling of a “perceived linear” volume … Read more
