Journeyman VCF

1970's Japanese Style Filter

This is the Oakley rude boy filter. Its completely nonlinear response and discrete circuitry gives it a unique sound of its own. Partially modelled after a classic Japanese filter design from the mid to late 1970s, the Journeyman can be switched to -6dB/octave high pass or -12dB/octave low pass modes by the flicking of a switch. When two of these VCFs are used together, one in HP and the other in LP, then the effect is astounding.

The filter heart is made entirely from a single ended discrete design and uses four matching diodes as the control elements. The filter behaves differently depending on the input signal level hence the 'drive' pot on the front panel. Turning this up allows the filter to be overdriven. At full resonance the filter will oscillate across most of the audio band.

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