I should have just googled it. The google AI was actually surprisingly helpful:
The Source Audio C4 Synth pedal can be used as a state variable filter (SVF) thanks to its highly customizable engine and the Neuro Desktop Editor or Neuro Mobile App
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Here's how to utilize the C4 as a state variable filter:
1. Understanding State Variable Filters:
- An SVF is a versatile type of filter that can produce low-pass, high-pass, band-pass, and notch filter responses simultaneously.
- It achieves this by using a combination of integrators and feedback loops, allowing for independent control over frequency, resonance (Q), and gain.
2. Using the Neuro Editor/App:
- Connect: Connect your C4 Synth to your computer or mobile device and open the Neuro Editor/App.
- Create a Preset: Create a new preset or modify an existing one.
- Filter Selection: Navigate to the filter section within the Neuro Editor/App.
- Choose a Filter: Select a filter algorithm that closely resembles or is designed as a state variable filter. The C4 offers a wide variety of filters, so look for terms like "SVF," "Multi-Mode," or "Ladder".
- Adjust Parameters:
- Cutoff Frequency: This controls the frequency at which the filter starts to attenuate the signal. Adjust it to change the filter's center frequency.
- Resonance (Q): Adjusting resonance will affect the filter's emphasis around the cutoff frequency. Higher resonance values create a more pronounced peak at the cutoff point.
- Filter Mode: If the selected filter offers multiple modes, you can switch between low-pass, high-pass, band-pass, and notch filter responses. This allows the C4 to function as different types of filters.
- Modulation: Take advantage of the C4's modulation capabilities by using LFOs or envelope followers to modulate the filter's parameters, particularly the cutoff frequency and resonance. This can create dynamic and expressive filter effects.
- Save Preset: Once you've dialed in the desired SVF settings, save your preset to the C4.
3. Tips for Using the C4 as an SVF:
- Experiment: Explore the different filter types available on the C4 to find those best suited for your sound.
- Modulation: Experiment with LFOs and envelope followers to modulate the filter parameters for more interesting and dynamic results.
- Community Presets: Look for state variable filter presets within the Neuro Community cloud for inspiration and ready-to-use sounds.
By following these steps and exploring the C4's deep editing capabilities, you can effectively use it as a state variable filter to create a wide range of synth and filter effects.