Here's some modules I have ordered, I've been trying my luck on ebay auctions and well I suck at it, I won 2 so far. Here's some of the modules arriving soon. Mind you I don't have a clear plan on what i'm gonna buy but I know having one of each type of module won't go to waste while I learn more.
Quad exponential VCA Module A-132-4 contains four identical voltage controlled amplifiers (VCA) with exponential control scales. Each VCA has two control voltage inputs (C1, C2), a signal input (In) and a signal output (Out). The control voltage inputs C1 and the signal inputs can be normalled by means of internal jumpers, i.e. the corresponding input signals of unit #1 can be connected to the switching contacts of unit #2. Those of unit #2 can be normalled to unit #3 and those of unit #3 to unit #4. If the normalling is not desired the jumpers have to be removed. In addition the sum of all four outputs is available (bottom left socket with the sum sign). Therefore unit #4 has only one control voltage input (only C1, no C2). If desired this socket can be jumpered as control voltage input 2. But then the sum signal is no longer available as a socket (only as an internal pin). For each VCA output a jumper is available that determines if the output signal of the corresponding VCA is added to the sum signal. From the factory all four jumpers are set (i.e. all four VCA output signals are added). By removing of one or more of the jumpers one can choose which VCA output is added to the sum. The jumpers can be replaced by switches too.
LPF is a four-pole, voltage controlled low-pass filter. Its 24 dB per octave slope and OTA topology provide a smooth, buttery character. Resonance can be pushed to self oscillation, turning it into a sine wave VCO with accurate 1V/oct tracking across four octaves.
In addition, CV over resonance gives dynamic sound shaping possibilities under voltage control. Hit the slope with LPF.
The EMW Phase 45 is a simple yet powerful analog 1-stage phaser module. It features manual controls for Feedback and Phase as well as a CV input for Phase modulation (Mod In).
The Synthrotek ADSR is a small and simple envelope generator with some very useful features. CV is additive for overall length of ADR stages in ADSR mode, add even more length to just the Release stage by adding CV into the Release jack. AR mode with CV over release length allows for snappy to long dynamic rhythm lengths. Very short minimum lengths, self cycling and a maximum output of 5 volts makes this tiny (4HP) envelope a very feature packed and versatile module.