Source Audio C4 Synth Advanced Stereo Synth Pedal

The Source Audio C4 Synth combines the limitless sound creation of a modular Eurorack synthesizer with the convenience of a compact effects pedal. Designed for both guitar and bass, the C4 delivers lightning-fast tracking, zero-latency performance, and a vast library of synth tones ranging from vintage analog classics to modern electronic textures.

Straight out of the box, the C4 Synth provides six dynamic presets, but its real power lies in the Source Audio Neuro Desktop Editor and Mobile App. With these free tools, players can access and create thousands of presets, share sounds within the growing C4 community, and unlock the pedal’s full modular synth capabilities.

Main Features

• Stereo 4-Voice Synth Effects Pedal – powerful modular synth engine in a stompbox
• Ultra-Fast Tracking – imperceptible latency with dual pitch detection modes for speed or accuracy
• 4 Independent Voices – each assignable to oscillators, pitch shifters, sequencers, distortion, tremolo, or filters
• 3 Oscillator Types – sine, square, and sawtooth waveforms
• 11 Envelope Followers – with adjustable attack, decay, and ADSR triggering
• 25 Filter Effects – including classic, modern, and experimental filters
• 14 LFO Wave Shapes – for vibrato, tremolo, and evolving modulation
• Dual 16-Step Sequencers – programmable individually or together
• Deep Editing Tools – via free Neuro Desktop (Mac/PC) & Mobile App (iOS/Android)
• 6 Onboard Presets in two banks, expandable to 128 presets via MIDI
• Stereo Inputs & Outputs – advanced routing options for complex setups
• USB & 3.5 mm Control Ports – for software, MIDI, and external controller integration
• Selectable Relay True or Buffered Bypass
• Power Supply – 9V DC (180 mA, centre negative) (not included)

Explore Limitless Synth Tones

With its four parallel voices, modular-style routing, FM synthesis, intelligent harmonizers, distortion, and filters, the C4 Synth is more than just a pedal – it’s a full synth engine.

• Instantly load one of the six onboard presets for plug-and-play synth tones.
• Browse and download thousands of community-created sounds via Neuro Cloud.
• Save your favourites directly to the pedal with a single click using the BURN feature.

Whether you want to recreate vintage analog synth textures, explore modern EDM-inspired tones, or design entirely new sounds, the C4 Synth delivers professional-grade creativity in a pedalboard-friendly format.

Specifications

• Voices: 4 independent synth voices
• Oscillators: Sine, Square, Sawtooth
• Filters: 25 filter effects
• LFOs: 14 wave shapes
• Sequencers: 2 programmable 16-step
• Presets: 6 onboard, 128 via MIDI
• Connectivity: Stereo In/Out, USB, MIDI In/Thru, 3.5 mm Control Port
• Power: 9V DC (180 mA, not included PSU)
• Bypass: Selectable True or Buffered