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BMC034 - Switched Resistor VCF | Barton Musical Circuits

BMC034 - Switched Resistor VCF | Barton Musical Circuits

From $7.99

To $89.97

This is a unique take on a DIY filter - an all analog filter module that employs resistors with analog switches to control frequency cutoff.

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    SKU BAR-BMC034

    This is a voltage controlled filter module which utilizes analog switches to adjust the frequency of the filter. The module features two state-variable filter sections which share a common frequency control, these can be used in series for heavier filtering or in parallel to work with stereo sound sources.  It has the following controls and I/O:


    • Frequency – Controls the frequency of both filters.
    • Frequency Modulation – Attenuates a modulating cv input for the frequency control.
    • Resonance 1 – Controls the amount of emphasis on the selected frequency of the filter for channel 1.
    • Resonance 2 – Same, but for channel 2.


    • Clock – An oscillator should be input here, it will be used as the clock for the analog switches in the circuit. Pulse waveforms should not be used.
    • CV – This is the input for the frequency modulation CV.
    • Input 1 – Signal input for channel 1
    • Input 2 – Signal input for channel 2


    • Low pass 1
    • Band pass 1
    • High pass 1
    • Low pass 2
    • Band pass 2
    • High pass 2

    The board features PC mounted pots for less wiring, and mounting holes for flexibility in panel layout. There are Eurorack and MOTM power connectors.

    Additional Information
    More Information
    Brand Barton Musical Instruments
    HP 8
    Additional Resources Build Guide

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