Synthrotek LPG PCBs and Panel - Low Pass Gate Eurorack Module PCB Set

Please note: this rendition of the LPG includes the PCBs and panel only. You will need to source the rest of the parts yourself. Please see the Bill of Materials link at the bottom of the page for a complete list of parts.

The LPG is a West Coast Synthesis staple! Our dual Low Pass Gate creates organic percussion timbres, paving the way for sonic exploration with a Buchla/Subotnick vibe.
The LPG has two low pass gates in one module. Its unique non-linear qualities emulate percussion timbres like congas, bongos, plucks, etc. The LPG is vactrol based, which creates natural-sounding decays. When the CV input is pinged by short/fast envelopes, it results in more organic sounds like bongos. The slide pot functions in two ways: when the the CV input is not patched, it attenuates/mixes the audio signal. When the CV jack is patched, it attenuates the output level and changes the timbre of the audio signal.
Each LPG channel can be used as a VCA. VCA mode bypasses the low pass filter and resonance and doesn't color the sound of your input audio. The vactrol gives the VCA a living, breathing, non-linear response.
Vactrols have a lot of variance, so even if you use the same vactrols for both channels, each channel may sound a little different. But the LPG will work with a number of different types/brands, including dual vactrols. In fact, each channel can be built with a different set of vactrols. (Note: VTL5C3 and VTL5C3/2 vactrols are not recommended in the LPG.)


Features:

• Two channels
• CV over resonance
• VCA and mixer function
• Input 1 normals to input 2

Specifications:

• Width: 4HP
• Depth: 57mm
• Current draw:
• +12V: 45mA
• -12V: 45mA

Assembly instructions, bill of materials and manual are available online!