Pittsburgh Modular Foundation

The Foundation is a fully modular, eurorack, analog synthesizer. A patchable system styled after the great monosynths of the past with no hardwired signal path or fixed voice architecture to restrict creativity. Driven by two wide range analog oscillators the Foundation produces a huge, warm sound that can't be matched by digital or VST synths. All of the elements of a classic voltage controlled synthesizer are available as an open, patchable, modern synth.
The Foundation is a "complete voice". It contains all the modules needed to produce a wide variety of complex sounds such as monster analog bass, cutting leads, evolving pads, and short percussive hits. All of which can be controlled directly using the Foundations' 42 knobs and switches then played with any standard Midi controller. The Foundation is also fully compatable with Expert Sleepers Silent Way software plug-ins¹.
An unpatched Foundation offers a clean slate for sonic exploration and sound design. The open format of a modular synthesizer allows for greater control and a deeper understanding of synthesis. The Foundation is comprised of a heavy duty eurorack case and individual eurorack modules designed to work together and as part of a larger modular system. Modules within the Foundation can be rearranged easily or replaced as a system grows or individual needs change.
Foundation Modules
Multiple Analog Waveforms
Wide Frequency Range
2 Independent Low Frequency Oscillators
3 Modes
Multifunction Module
4 Channel Mixer
4 Independent Attenuators
Lowpass, Highpass, Bandpass, Variable Outputs
Voltage Controlled Frequency and Q
Filter and Oscillator Modes
4 Stage (Attack, Decay, Sustain, Release)
Fast and Slow Modes
Attenuated CV Input
Individual and Mix Outputs
Stereo or Dual Mono Outputs
CV Out
Gate Out
CC Out
2 Sets of Connected Jacks
Power Switch
Power LED
Foundation Specs
90hp Eurorack Case
Sliding Nut Mounting Nut SystemRemovable Lid
Dimensions with Lid: 19.25 x 6.25 x 6
+12v / -12v 1A
External Power Adapter
5x 6"
5x 12"
5x 24"

¹Silent Way is a suite of plug-ins designed for use with analogue synthesisers, and especially as part of a modular analogue synthesiser system. The plug-ins produce no sound themselves, nor do they process sound - rather, they generate signals to be used as control voltages (CVs), which can be patched into the control inputs of oscillators, filters, VCAs etc. of an analogue system. Also, with the addition of the CV Input plug-in, it is possible to bring CVs from the synth into the computer, for recording or processing.
Silent Way software Plug-ins are a product of Expert Sleepers and are not included with the Pittsburgh Modular Foundation. A 10% off coupon code good toward Silent Way and other Expert Sleepers plug-ins is included with the Foundation. A free trial of the software is available at the Expert Sleepers website.
²The Ad Infinitum patch cables are fully-molded patch cables constructed of 26AWG stranded copper wire with a low-loss 95% spiral-wound copper shield in a 2.8mm PVC jacket. The copper is 99.99% pure and oxygen-free. The connectors are nickel-plated, providing high corrosion resistance.




