Frequency Central has released the Product voice module, which they describe as a full featured modular synthesiser which you can use without patching or as the heart of your modular system. Product is available both fully assembled and as a PCB/panel set. Each component part is fully modular, but also features pre-patched normalised signal paths for fast set up of sounds. Here's more details direct from Frequency Central...
Product is a combination of three individual Frequency Central modules:
Product features a motherboard on which all pots, switches and sockets are mounted, this is also where the pre-patched normalising happens. So the onboard LFO is available for both FM and PWM of the VCO. The three VCO waveforms are available at the three VCF signal inputs. 1V/oct input, LFO and ADSR are available at the three VCF signal inputs. By some cunning switching, the VCA can be operated by either ADSR or gate input, alternatively it can be set to drone position. Also available are signal outputs from the LFO and noise generator. All pre-patched connections can be broken simply by inserting a jack into the relevant socket.
To simplify the build process for DIYers, there are three daughterboards that plug into the Product motherboard: VCO daughterboard, VCF/VCA daughterboard, and ADSR/noise daughterboard. First you can build and calibrate the VCO daughterboard, plug it into the Product motherboard, get it running and have some fun with it. Then build the VCF/VCA daughterboard, and add it to you expanding modular synthesiser. Finally build the ADSR/noise daughterboard, and your synth is complete.
Pricing and Availability:
Product is available both fully assembled and as a PCB/panel set.
Product PCB set, and panel: £75 GBP
Build doc for DIYers: Product Build Doc
Product assembled module: £295 GBP