The Source Audio C4 is a synth pedal capable of a vast array of synthesizer sounds and functions with extensive editing capabilities. Inspired by Eurorack and other modular synthesizer makers, it boasts a comprehensive editing companion software to tailor its functionality to your needs. You get not only one oscillator that tracks incoming signals, but four—capable of both monophonic and polyphonic pitch tracking. Each oscillator features a selection of sine, square, and sawtooth waveforms, which are independently selectable. Add distortion, pitch shifting, or tremolo effects to the signal chain, as well as a selection of between 24 filter types. Modulate your sounds with the available 11 envelope followers, 14 LFOs with eight waveshapes, and dual 16-step sequencers with both preset and user-definable sequences.

The C4 comes equipped with three synth presets out of the box that work great for guitar players. However, with the help of MIDI, you get up to 128 MIDI-accessible presets. The companion desktop editor and mobile app help you fully customize your pedal, with all the available parameters right at your fingertips. C4 represents a new step forward in the realm of synth pedals, offering an incredible amount of customization and possibilities for sonic creations.