On the surface, the C4 features a simple 4-knob interface and a choice of three guitar/bass synthesizer effects – just plug-in and submerge your instrument in a sea of swelling, buzzing, and swirling synth tones. If you want to take things to take things a bit further, we urge that you connect the C4 to our Neuro Desktop Editor (a free download for Mac and Windows) or Neuro Mobile App (a free download for iOS and Android).  Inside the Neuro Editors you will find the tools to personally create your own retro-futuristic synthesizer tones. Use the C4’s collection of four parallel voices, three oscillator wave shapes, ten-plus envelope followers, twenty-plus modulating filters, distortion, tremolo, pitch shifting, intelligent harmonization, programmable sequencing and more to dial in that perfect tone. Find it all, from the classic synth tones you’ve always wanted to replicate to those illusive abstracts you’ve imagined, but never actually heard. If you’re short on time and/or patience, it’s very easy to find tons of great sounds – simply  call up an effect from countless presets created by the Source Audio team or the growing legion of C4 users.

We at Source Audio are out of our minds with anticipation for the release of the C4 Synth – we cannot wait to hear the sounds y’all come up with for our exciting new pedal.

You probably want to hear how the C4 sounds, correct? Well since the pedal is still a work-in-progress, we have not yet created a formal demonstration video, but we have been posting a bunch killer sounds that we’ve come up with along the way. Some of our favorites we included in the C4 Synth Preview video, which is a compilation of Instagram posts between the months of 1/19 and 6/19. Please feel free to check our Instagram for additional C4 clips and other Source Audio related fun. C’mon and join our social scene – NO TROLLS!

The true power of the C4 Synth resides in its Neuro Desktop or Mobile Editing interface. Source Audio President Roger Smith said in a recent interview, ” When we create our own library of sounds, we put them out, and they have a certain level of popularity. But it has been far more interesting to tap into the world of hobbyists interested in creating their own sounds with our Neuro Desktop Editor. They create presets and publish them into a communal sharing space where others can use and further edit them. Creating this kind of collaborative world is ultimately the kind of direction we’re heading.”

With the Neuro Editor it will be possible to create highly customized presets for your C4 Synth. Presets can then be published and made available to the entire Neuro community. The illustration below shows the current state of the C4’s Neuro Desktop Editor. You will see that it is possible to edit each to the C4’a four voices, including things like Oscillator Wave Shapes, Envelope Types, Filters, Distortion, FM Synthesis, Pitch Shifting, Harmonization, Sequencing, and much more. We cannot wait to hear the sounds created by the ever-growing base of Source Audio pedal owners.

The block diagram below illustrates the current architecture of the C4 Synth and Spectrum Intelligent Filter. It provides a look at the internal signal path of both pedals.

VOICE BLOCKS
There are four Voice Blocks.  Within each Voice Block select from any of the following Voice Types: Dry Signal, Monophonic Pitch Shifting, Polyphonic Pitch Shifting, and three types of Synth Oscillator Wave Shapes (including Sine, Square, and Saw). In these blocks you will also be able to select voice level, stereo panning, distortion/fuzz engage, filter engage, pitch modulation, and detuning amount.

DISTORTION BLOCK
Choose a type of distortion from a long list of Source Audio favorites, including Soft Clipping, Foldback, and Gated Fuzz. Dial in the Drive amount and Clean/Dirty Mix.

FILTERS BLOCK
Choose from over 20 different filter types.  Decide whether you want to control the filter modulation with an envelope follower or LFO and set the LFO Speed. Dedicated controls allow you to set the Envelope Sensitivity, Filter Modulation Depth, Frequency Starting Point, and Q Level (a.k.a. “Resonance’).