This is a bare PCB for the Shruthi Sidekick - a simple circuit, of dimensions similar to those of the Shruthi-1 digital board, which allows you to drive one of the Shruthi-1 filters without all the hassles of MIDI, menus, and modulation matrices.

Choose your favorite Shruthi filter board, attach the Sidekick on top of it, plug in an external audio source (if desired) and start filtering!

A fully through-hole design makes this an easy assembly for all levels of DIY experience.

Features:

• 2 square/triangle LFOs

• 2 AR envelopes (assigned to the VCF frequency and the VCA gain)

• the LFOs can oscillate at audio rates, allowing them to be used as droning oscillators, a FM source or ring-modulators

• the envelopes are triggered by a dedicated button