Circle of Fifths Standalone Harmonic Synthesizer – Multi-Engine Acoustic-Electric Performance Instrument

Product Overview

Discover a clear and intuitive approach to sound design, chord exploration, and live performance. Built on foundational music theory, this Circle of Fifths Standalone Harmonic Synthesizer maps complex harmonic progressions directly onto an ergonomic, touch-responsive geometric interface. It allows creators to perform sophisticated chord textures that are typically difficult to execute. 🌌🎵

At its core is a high-quality sound engine rooted in the natural overtone series, granting precise microtonal manipulation over seven independent harmonics. Housed in a hand-assembled solid walnut chassis with integrated surface resonance transducers, this instrument transforms its own wood grain into a warm acoustic speaker. Whether used as a portable sonic sketchbook or integrated via USB-C and 1/4" outputs into a studio setup, it offers a fresh approach to expressive sound synthesis. 🌲🎛️

Key Features

Geometric Chord Interface – Features out-ring triangular buttons for Major and Minor triads, alongside inner-ring Star keys for Diminished chords. Easily extend chords into 7ths, 9ths, #11ths, and 13ths by sliding clockwise. 🔄🎹

Monophonic Shift Mode – Tap the dedicated Shift modifier to quickly force all chord buttons to play their root notes, allowing sound designers to build intricate voicings note-by-note. 🛠️🎶

Triple-Engine Synthesis – Switch easily between three distinct internal sound engines — the additive harmonic series model, a subtractive wave model, and an ambient granular loop engine. 🎛️🧪

Physical Strumming Ribbon – Features a manual arpeggiator ribbon that allows you to "pluck" or sweep through chords like a physical harp or guitar. Designed to respond to velocity and position leaps for flowing musical passages. 🏹✨

Tactile Mechanical Keybed – Equipped with quiet linear mechanical switches under every control key, providing a smooth, near-silent, and responsive tactile feel. 🕹️⌨️

Dual-Button Multi-Function Commands – Includes Top and Bottom action buttons that toggle note quantization, change strum behaviors, alter voicing layouts (Drop 2 Open/Closed voicing), and swap play modes (Instant, Bassline, or Arpeggiator-Only). ⚙️💡

Product Specifications

• Product Type: Standalone Electro-Acoustic Multi-Engine Synthesizer
• Harmonic Control: 7 Independent Overtone Faders with Detuning (Sharp/Flat) & FM Ratio Control Knobs 🌌
• Subtractive Waveforms: Triangle, PWM, Sawtooth, and Sine/FM Oscillators with sub-octave configuration 🌊
• Granular Synthesis Controls: Dedicated faders for Spray (density), Grain Size (repetition speed), and Jitter (rhythmic randomized delay) 🔮
• Acoustic Speaker Resonance: Dual internal surface transducers using the solid wood shell as an acoustic chamber 📢
• Integrated FX Processor: 2-knob Ambient Reverb Engine (Decay Time & Wet/Dry Mix) 🎚️
• Enclosure Architecture: Hand-assembled, ethically sourced solid American Walnut 🪵
• I/O Connectivity: USB-C Multi-Voltage Port (4V–17V), USB MIDI Output, 1/4-inch Stereo Audio Output Jacks 🔌
• Power Capability: Portable operation via 4 x Rechargeable AA Batteries (Not Included) or USB-C tethered power 🔋

What's In The Box?

• 1 x Circle of Fifths Standalone Harmonic Synthesizer Main Unit 🎹
• 1 x Multi-Voltage USB-C Power & MIDI Connection Cable 🔌