|Old version of the A-135|
It was made of 4 independent linear VCA's, mixed to one common output.
For each VCA the following inputs and controls were available: audio input with attenuator, control voltage input with attenuator, gain (pre-amplification).
The VCA's were realized with high-quality CEM VCA's (CEM3381).
The module could be used for voltage controlled mixing of up to 4 audio signals with separate control voltages (e.g. by LFO's, ADSR's, Random, Shepard generator, MIDI-to-CV interface or other control voltage sources).
In June last year, Doepfer announced the re-design of several modules because of shortage of CEM3080 Chips that were used in this A-135 and other modules.
This year a few of these re-designed modules were released, each in a slightly extended/ improved version (like the A-130/131 that are now also DC-coupled, and the recently announced A-141-2).*
|A-135-1 Redesign of the A-135|
They've also managed to make it only 18 HP instead of 22 HP wide.
The new version of the A-135-1 is also able to process slowly varying control voltages because the signal in/outputs are DC coupled.
The new version is manufactured from May 2013 and is available now.
* More re-designs were also promised to us last year, like the A-107, A-116, A-127, A-132-1, A-147, A-171), so that promises a lot for the future...
Find more about various Doepfer re-designs via http://patchpierre.blogspot.nl/search/label/Re-design