Source Audio C4 Synth View larger

Source Audio C4 Synth

SA 249 OS C4

Source Audio


Source Audio's C4 Synth Pedal packs the power of a classic Eurorack modular synthesizer into a compact, rugged effects pedal for your guitar or bass. With four simple controls, a choice of three guitar/bass synth effects, and multiple methods of patch storage and recall, the C4 is remarkably easy-to-use and it boasts wicked-fast response, rock-star tracking capability, and limitless sonic potential. Just plug and play to immerse your axe in an ocean of killer synth sounds.

More details

Delivery time 2-3 weeks

299,00 €

More info


  • Unprecedented sound sculpting options with modular synth-inspired software editors for maximum sound exploration
  • Powerful Neuro Desktop Editor (free download for Mac, Windows)
  • Neuro Mobile App (free download for iOS, Android)
  • Create custom C4 Synth presets that can be burned directly to the pedal, saved to your private cloud library, or shared with other members of the Neuro community
  • 128 MIDI-accessible factory presets with addition of 3rd-party MIDI controller and USB host provides
  • Ever-growing published Preset library created by Source Audio and the C4 Neuro community
  • Easy plug-and-play using 3-position toggle switch to select from any of the C4's three pre-loaded synth patches
  • Mix together any of the C4's 4 independent voices
  • Assign any voice to oscillator wave shape, monophonic or polyphonic pitch shifter, intelligent harmonizer, and sequencers; or dry signal to distortion, tremolo, and filter FX
  • Mix and match any of the C4's 3 oscillator wave shapes (sine, square, or saw) for pure synth tones
  • Select from 11 envelope followers with adjustable attack/decay and ADSR triggering envelopes
  • Choose from 25 filters, controllable with an envelope follower or independently modulating LFOs
  • 14 onboard LFOs (Low Frequency Oscillators) to control modulation of filter, vibrato, and tremolo
  • 8 available LFO wave shapes, including sine, square, sample and hold, saw tooth, and more
  • Run 2 simultaneous 16-step sequencer patterns
  • Choose from pre-programmed sequencer patterns or create your own custom patterns.
  • 2 modes of operation: Standard Mode for classic stompbox operation; Preset Mode to save user presets (including all knob positions) to each of the three toggle switch positions
  • Stereo Inputs and Outputs: use Neuro Editor panning controls to route each Voice to any location in the stereo field
  • Universal Bypass: analog buffered or relay-based True Bypass
  • MIDI control connects to Neuro Hub for access to 128 presets with MIDI Program Change (PC) messages, control of pedal parameters with MIDI Continuous Controller (CC) messages, or assigning LFO speed with MIDI Clock
  • USB Port (class-compliant USB-MIDI) for plug-and-play with Mac and Windows recording software; connectivity with Neuro Desktop Editor for deep editing and pedal firmware updates
  • Control Input jack for External Expression and Tap Tempo control: use with optional Source Audio Dual Expression Pedal (expression control for multiple parameters) or Tap switch to adjust LFO rates on the fly
  • Durable, compact anodized aluminum housing with sturdy hardware
  • Includes 9V DC power supply (300mA, negative tip; pedal draws 165mAP