The latest incarnation of the Erica Synths AcidBox mobilizes the core of the infamous Polivoks VCF, albeit in stereo and alongside an optimal feature set consisting of a unique overdrive circuit, syncable LFO, an envelope follower, and both manual and remote control over the filter cutoff.
The AcidBox was designed for use with a wide variety of audio sources, particularly guitars and line level sources. Lending to this orientation is a configurable control input that lets users connects a bypass footswitch or expression pedal, adjustable input gain, and an LFO sync trigger. All of this and more makes the AcidBox III ideal for both the studio and the stage.
AcidBox III Features
Polivoks core stereo lowpass/bandpass VCF with the original programmable opamps
Unique audio overdrive circuit
Versatile syncable LFO with 8 waveforms
Tap tempo button
Envelope follower with modulation level attenuverter
Master modulation control
Manual and CV control over cutoff frequency
Configurable control input for footswitch, expression pedal and external LFO/cutoff control
Erica Synths Acidbox III is a stereo Polivoks Filter in a box with both bandpass and lowpass modes and CV control over filter cutoff. There is a tap tempo LFO with multiple clock divisions and waveshapes as well as an envelope follower. The input level can be adjusted for overdriving the filter and the cutoff knob is huge for having fun with filter sweeps. In this video a Ants! Modular Synth sequenced by a Korg SQ-1 is the input to the Acidbox.
Erica Synths AcidBox III Desktop Polivoks VCF Reviews