Pricing and availability

We compare 600+ stores and found this item at 8 stores. Prices updated .

Sweetwater
4.5 (29)
$269.00
Reverb
5.0 (29)
$266.66 New
$190.00 Used
zZounds
5.0 (2)
$269.00
Thomann
4.5 (82)
$266.00 $262.00 $4.00 · All time low
Gear4Music
£255.00

Average Price: $258

Standard/Professional

$150

$601+

Price Tier

Budget

Standard

High-end

Price History

Based on price data from 6 merchants for "Source Audio C4 Synth". Prices shown reflect NEW condition. Tracking began Apr 2, 2026.

* Product prices and availability are updated by Equipboard every 24hrs and are subject to change. Equipboard may receive compensation for purchases made at participating retailers linked on this site. This compensation does not affect what products or prices are displayed, or the order of prices listed. For more information, please refer to our affiliate disclosure.

Description

Dive into a world of unparalleled sonic exploration with the Source Audio C4 Synth Pedal. This compact powerhouse encapsulates the limitless potential of a classic Eurorack modular synthesizer in a user-friendly, guitar or bass pedal format. Offering an ocean of synth tones, the C4 Synth lets you immerse your instrument in a sea of swirling, buzzing, and pulsating sounds.

The C4 is not just a pedal, but a modular synth in a box, boasting unprecedented tracking abilities and an array of sound options. It is equipped with four parallel voices, three oscillator wave shapes, and more than ten envelope followers, offering a wide range of sound design possibilities.

With the free Neuro Desktop Editor or the Neuro Mobile App, you can unlock a universe of sound sculpting options. From classic synth tones to abstract sounds you've only dreamt of, the Neuro software provides an intuitive and expansive interface for creating your unique sonic masterpieces.

Key Features:

  • Compact and user-friendly guitar/bass synth pedal
  • Modular synth in a box with unprecedented tracking abilities
  • Four parallel voices and three oscillator wave shapes for diverse sound design
  • Free Neuro Desktop Editor & Neuro Mobile App for deep sound editing
  • 128 Factory presets accessible via MIDI
  • Multiple methods of preset storage and recall for seamless plug-and-play experience
  • Mix and match any of the C4’s three oscillator wave shapes for pure synth tones
  • 11 envelope followers with adjustable attack/decay and ADSR triggering envelopes
  • 24 modulating filters, controllable with an envelope follower or independently modulating LFOs
  • 14 onboard LFOs for modulation of filter, vibrato, and tremolo
  • Run two, simultaneous 16-step sequencer patterns
  • Stereo inputs and outputs for multiple routing options
  • Universal Bypass: switchable analog buffered or relay-based True Bypass
  • USB port for plug and play with Mac and Windows recording software
  • Durable, compact anodized aluminum housing with sturdy hardware
  • Includes 9V DC power supply (300mA, negative tip; pedal draws 165mA)

Product specs

Pedal Type Guitar Synth
Analog/Digital Digital
Effects Neuro Software: Modulating Filters, Distortion, Tremolo, Pitch Shift, Harmonization, Envelope Followers
Presets 128 x MIDI presets, 6 x accessable
Inputs 2 x 1/4"
Outputs 2 x 1/4"
MIDI I/O USB
USB 1 x Mini-B
Other I/O 1 x 1/8" (expression, tap tempo)
True Bypass Yes, Switchable to Analog Buffered
Bypass Switching Relay Based
Software Neuro Desktop Editor/Mobile App (Mac, PC, iOS, Android)
Power Source 9V DC power supply required (included)
Power Usage 165mA
Height 2.0"
Width 2.75"
Depth 4.5"

FAQs

What types of effects can the Source Audio C4 Synth Pedal produce?

The Source Audio C4 Synth Pedal can produce a range of effects including modulating filters, distortion, tremolo, pitch shift, harmonization, and envelope followers, all customizable via the Neuro software.

How do I access presets on the Source Audio C4 Synth Pedal?

The Source Audio C4 Synth Pedal allows access to 128 MIDI presets, with 6 presets directly accessible through the pedal itself.

Is the Source Audio C4 Synth Pedal compatible with expression pedals?

Yes, the Source Audio C4 Synth Pedal is compatible with expression pedals via its 1/8" input, allowing for real-time control over various parameters.

Can the Source Audio C4 Synth Pedal be integrated with a DAW?

Yes, the Source Audio C4 Synth Pedal can be connected to a DAW via its USB Mini-B port, enabling MIDI control and further integration with digital audio workstations.

Does the Source Audio C4 Synth Pedal support true bypass?

Yes, the Source Audio C4 Synth Pedal features switchable true bypass, which can be set to analog buffered bypass for maintaining signal integrity in different setups.

BassTheWorld.com

BassTheWorld.com

SOURCE AUDIO C4 Synth Pedal

Video thumbnail for SOURCE AUDIO C4 Synth Pedal by BassTheWorld.com

SOURCE AUDIO C4 Synth Pedal

BassTheWorld.com

BassTheWorld.com

Video thumbnail for Mind-Blowing Synthesizer Pedal | Source Audio C4 Synth by Nate Navarro

Mind-Blowing Synthesizer Pedal | Source Audio C4 Synth

Nate Navarro

Nate Navarro

Video thumbnail for Source Audio C4 Synth by Mike Hermans

Source Audio C4 Synth

Mike Hermans

Mike Hermans

Video thumbnail for Source Audio C4 Synth - Neuro App Editor Deep Dive - Bass Demo by Zachary Rizer

Source Audio C4 Synth - Neuro App Editor Deep Dive - Bass Demo

Zachary Rizer

Zachary Rizer

Video thumbnail for Source Audio C4 - Full Demo by Deadbeat Studios

Source Audio C4 - Full Demo

Deadbeat Studios

Deadbeat Studios

Video thumbnail for Source Audio C4 Synth Pedal — Daniel Fisher & Don Carr by Sweetwater

Source Audio C4 Synth Pedal — Daniel Fisher & Don Carr

Sweetwater

Sweetwater

Video thumbnail for Source Audio C4 Synth Pedal FULL DEMO with Neuro App by Nobes Music

Source Audio C4 Synth Pedal FULL DEMO with Neuro App

Nobes Music

Nobes Music

Video thumbnail for 5 CREATIVE Guitar Tones with the Source Audio C4 SYNTH by Seán Murray

5 CREATIVE Guitar Tones with the Source Audio C4 SYNTH

Seán Murray

Seán Murray

Video thumbnail for Source Audio C4 Synth | zZounds by zZounds

Source Audio C4 Synth | zZounds

zZounds

zZounds

Video thumbnail for Source Audio C4 Synth (Stereo) by Pedal of the Day

Source Audio C4 Synth (Stereo)

Pedal of the Day

Pedal of the Day

Reviews

PROS

  • Wide range of tones, from subtle to extreme effects

  • High-quality tracking, especially for single-line playing

  • Programmable with up to 128 presets via the app

  • Strong community support for sharing and downloading presets

  • Can be used effectively with both bass and guitar

  • Includes a variety of effects beyond synth (e.g., wah, octave, phaser)

  • Integrates well with external MIDI controllers for expanded control

  • Non-intrusive, maintains signal integrity when bypassed

  • Versatile for live and studio applications

CONS

  • Requires significant time to learn and master

  • App necessary for full functionality; pedal less useful without it

  • Limited to mostly monophonic use; chord tracking can be problematic

  • Some factory presets may not appeal to all users

  • External Bluetooth receiver needed for wireless connectivity

  • The user interface can be difficult for some to navigate

  • Only 6 presets can be stored on the pedal for direct access

  • No built-in Bluetooth for direct smartphone connection

Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Source Audio C4 Synth.

Use cases and applications

  • The C4 is used as a creative tool for songwriting, with some owners developing up to 25 diverse presets ranging from synthy to atmospheric sounds.

    Source
  • The C4 can be used to create not just synth patches but also combine octavers, distortion, envelope filters, and more in a single patch.

    Source
  • Some users utilize the C4 Synth to enhance live performances, creating patches that simulate a power chord an octave up to fill in rhythm guitar roles.

    Source
  • The C4 Synth is effectively used to mimic a 12-string guitar effect, although the poly pitch shifts can be slightly warbly.

    Source
  • Some owners use the C4 Synth primarily as a tweakable envelope filter and octave pedal, complementing their existing pedal setups.

    Source
  • Users interested in traditional mono-synth sounds, like a detuned saw or Mini-Moog style, find the C4 effective for such applications.

    Source

Mods and upgrades

  • Owners recommend using a Source Audio Neuro Hub or similar MIDI controller to switch presets mid-performance, as the pedal itself lacks dedicated buttons for this.

    Source

Comparisons

  • The Boss SY-1 is seen as more practical for live use due to its ease of access, though the C4 offers a broader range of sounds.

    Source
  • The Panda MIDI Future Impact offers more powerful oscillators with up to 3 waveforms per oscillator plus PWM, compared to the C4.

    Source

User experience

  • Some users report software bugs such as the pedal being active without the bypass LED, requiring repowering to resolve.

    Source
  • When used with an expression pedal, the 'reese bass' preset can drop in volume during sustained notes, which is a notable consideration for those using it live.

    Source
  • Users find it challenging to dial in synth tones due to their complexity, which can limit immediate use in live settings without prior adjustments.

    Source

Software and compatibility

  • The Neuro Desktop editor is necessary for deep editing, while live settings benefit from using a DMC MIDI controller to access all 128 presets.

    Source
  • Connecting the C4 Synth to a Disaster Area DMC MIDI controller via USB makes all 127 presets easily accessible, enhancing its versatility.

    Source
  • MIDI CC can control nearly any parameter, but links are global for all presets, requiring different MIDI CCs for varying control.

    Source

Features and functionality

  • The C4 Synth is backwards compatible with patches from other Source Audio pedals, expanding its utility beyond synth sounds to envelope filters and octavers.

    Source
  • The C4's modular approach allows swapping sound sources, filters, and drives, but LFO and envelope modulation mix is global for the preset.

    Source

Critic Reviews

Source Audio C4 Synth review | MusicRadar

musicradar.com

The Source Audio C4 Synth delivers an impressive range of synth sounds that can transform your guitar tone into something truly unique. With 128 presets and a user-friendly Neuro app for deep editing, it offers a wealth of sonic possibilities. However, it requires careful technique and may not suit players who prefer straightforward setups without app dependence. While the tracking is excellent, the need for precise playing can be a drawback for some. Overall, this pedal is a compact powerhouse for adventurous musicians, but it demands a bit of commitment to unlock its full potential.

positive

Source Audio C4 Synth Review - Premier Guitar

premierguitar.com

The Source Audio C4 Synth is a powerful tool for guitarists looking to explore synthesizer sounds. Its intuitive Neuro app enhances the experience, allowing for deep customization and easy preset sharing. However, achieving classic synth tones can be challenging; the pedal leans more towards modern digital palettes, leaving some vintage enthusiasts wanting. While the streamlined control set limits on-pedal tweaking, the expansive sound potential and engaging app make it a worthwhile investment for adventurous players.

positive

Source Audio C4 Synth review | Guitar World

guitarworld.com

The Source Audio C4 Synth impresses with its rich array of synth sounds and excellent tracking capabilities. With 128 user presets and deep editing options via the Neuro app, it opens up a world of creative possibilities. However, players should be mindful of their technique as glitches can occur, though this is common with synth pedals. Overall, it's a compact powerhouse for anyone looking to enhance their sound without overwhelming complexity.

positive

5.0 out of 5

Based on 1 Review and 6 Ratings

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GOATED Synth

Great tracking! Thanks to the community for the presets, infinite things to do with this pedal!

Artist usage

Add artist
See how Justin Vernon uses Source Audio C4 Synth

Justin Vernon

Singer, Guitarist

Bon Iver

...
Verified via Elektronauts

part of his pedalboard for "i,i" tour

See how Nick Reinhart uses Source Audio C4 Synth

Nick Reinhart

Singer, Guitarist

Death Grips

...
Verified via Photo

Nick posted on his Instagram on 2/27/2020 of his pedal board with a Source Audio C4 synth pedal. Its most likely been spray painted by Nick, but he's labeled all 4 knobs with names consistent with how Source Audio labels their "normal" C4 pedal. It's the purple pedal with "C4" in white on the top right.

See how Kurt Ballou uses Source Audio C4 Synth

Kurt Ballou

Guitarist, Music Producer

Converge

...
Verified via Photo

This rocks! I love being able to do sub synth with glissando with a guitar! @sourceaudio #c4 #c4synth

See how Doug Wimbish uses Source Audio C4 Synth

Doug Wimbish

Bassist

Living Colour

...
Verified via Photo

Doug Wimbish showcases the Source Audio C4 Synth on his Instagram, highlighting its integration into his pedalboard setup.

See how Billy Strings uses Source Audio C4 Synth

Billy Strings

Guitarist

...
Verified via Photo

Mentioned in interview (Billy Strings' Gear section): https://www.premierguitar.com/artists/guitarists/billy-strings-and-molly-tuttle

See how John Dieterich uses Source Audio C4 Synth

John Dieterich

Guitarist, Music Producer

Deerhoof

...
Verified via Source Audio Website

John Dieterich uses the Source Audio C4 Synth, as confirmed by Deerhoof's artist page on the Source Audio website.

See how George Pajon, Jr. uses Source Audio C4 Synth

George Pajon, Jr.

Guitarist, Music Producer

Black Eyed Peas

...
Verified via Premier Guitar

In a rig rundown featured by Premier Guitar and authored by Tzvi Gluckin, it is confirmed that guitarist and music producer George Pajon, Jr. uses the Source Audio C4 Synth.

See how Chris Buono uses Source Audio C4 Synth

Chris Buono

Guitarist

...
Verified via Chris Buono

Guitarist Chris Buono confirms on his official website that he uses the Source Audio C4 Synth.

Album Usage

The Source Audio C4 Synth has been featured on the following albums:

Genre Usage

Based on how artists on Equipboard use this gear, it is most commonly found in the following genres.

Used With

Based on how musicians on Equipboard use Source Audio C4 Synth, it is most commonly used with the following gear.

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Community setups

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leonardo_vilela

leonardo_vilela

Gear IQ 115

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