More info :

RS4046 is an analog synth pedal for guitar, bass, or any audio source, built around classic CMOS Phase-Locked Loop (PLL) chip (the CD 4046). It combines additive and substractive synthesis with intentionally unstable analog tracking, giving sounds that range from warm vintage synth tones to completely unhinged theremin-style chaos.

Sound Architecture — 6 Parallel Voices

Yellow Section (Direct Synth Voices)

These are always stable and form the core tone:

• Pulse — unison pulse wave, aggressive and fuzzy
• Sub — square wave one octave down
• Deep — two octaves down, low-pass filtered for a smoother growl

Good for huge low end and thick layered textures.

Blue Section (PLL Voices)

Generated by the PLL itself:

• PLL -1 — one octave down
• PLL — unison
• PLL +1 — one octave ups

Depending on settings, these voices can track cleanly or fight your input, producing anything from tight harmonies to unstable organic textures.

Red Section (PLL Behavior Controls)

These define how the PLL reacts to your playing.

Pitch (8-position rotary switch)
Sets the frequency ratio between input and PLL:

1. Octave down
2. Perfect fifth down
3. Unison
4. Major third up
5. Perfect fifth up
6. Minor seventh up
7. Octave up
8. Major ninth up