Vongon Rosetones Polyphonic Resonator Synth Effects Pedal

Vongon Rosetones is a polyphonic, resonant string synthesiser pedal that turns any equal tempered instrument into a blooming harmonic engine. By tracking the notes you play and routing them into a bank of tuned resonators, it creates evolving chords, shimmering drones and rich, orchestral textures that follow your performance in real time.

At its heart is a 12 voice chromatic resonator bank that continuously analyses your input and assigns each detected pitch class to its own tuned delay line. These resonators can swell, sustain and feed back into one another, generating everything from subtle sympathetic resonance behind your dry tone to fully immersive synth soundscapes. Twelve central LEDs show the activity of each resonator as you play, so you can literally see your harmony moving and shifting.

The octave control lets you slide the entire 12 note window up and down the keyboard range without affecting pitch detection, effectively re voicing the same chords into new inversions. Simple triads can be transformed into glassy upper register clusters or deep, organ like voicings, while a low bass line can be used to excite higher resonators for a striking contrast of weight and shimmer. Modulation, sensitivity and feedback controls then shape how animated and how long lived those harmonics become.

Rosetones is equally at home with guitars, basses, synths and other equal tempered sources, and it can even sing on its own as a standalone drone instrument when pushed into self excitation. With MIDI control, selectable gain and bypass modes, onboard presets and a beautifully crafted walnut enclosure, it is a powerful creative tool for ambient players, sound designers and anyone looking to add a new harmonic dimension to their rig.

Polyphonic Sympathetic Resonance

Rosetones listens to your playing and routes detected pitches into a 12 voice chromatic resonator bank. Each pitch class excites its own tuned delay line, creating lush, polyphonic resonance that blooms around your dry signal. This lets you generate complex, evolving chords and textures from even the simplest melodic lines, without having to change your playing style.

Octave Window Harmonic Re Voicing

The octave control shifts the active 12 note window across the keyboard range while pitch tracking remains anchored to your actual notes. This means you can play a basic triad and then sweep the octave to hear it re voiced into new inversions and registers. Bass lines can drive high voiced resonators, turning low notes into airy, shimmering harmonics that sit beautifully in a mix.

Expressive Modulation and Dynamic Control

Dedicated CHORUS and VIBRATO modes add movement and depth to each synth voice, from subtle ensemble width to more pronounced pitch drift. Sensitivity and feedback controls determine how strongly your notes excite the resonators and how long they sustain, so you can dial in anything from short, percussive resonances to slowly evolving harmonic blooms that respond to your touch.

MIDI Integration and Standalone Drone Capability

With MIDI note input you can articulate precise harmonies that lock to your timing and phrasing, layering synth like chords over your instrument. Every faceplate parameter can be controlled via MIDI, with onboard preset storage for quick recall. At higher sensitivity and feedback settings, Rosetones can also function as a standalone sound source, using its internal noise floor to excite the resonators and produce rich, controllable drones shaped by octave, tone and modulation.

• 12 Voice Polyphonic Resonator Engine - A chromatic bank of 12 tuned delay line resonators tracks your playing and generates blooming, polyphonic harmonic content. Each pitch class has its own resonator, allowing chords and melodies to expand into dense, evolving textures that remain musically grounded.
• Adjustable Octave Window - The octave control shifts the active 12 note window across the keyboard range without altering pitch detection. This lets you re voice the same chord shapes into different registers, create high shimmer from low notes, and explore new harmonic perspectives without changing your fingering.
• Chorus, Vibrato and Dynamic Resonance Shaping - Selectable CHORUS and VIBRATO modulation modes add per voice detune and pitch movement for animated, ensemble like sounds. Input sensitivity and feedback sustain controls let you fine tune how quickly the resonators respond and how long they ring out, from tight, rhythmic accents to expansive ambient washes.
• MIDI Control, Presets and Flexible I/O - Full MIDI access to every front panel parameter, plus MIDI note input, opens up deep integration with DAWs and hardware controllers. Selectable gain modes accommodate low instrument, instrument and line level signals, while switchable analogue buffered or DSP trails bypass and onboard preset storage make Rosetones easy to drop into both pedalboard and studio workflows.

Core Engine

• Polyphony: 12 voice polyphonic sympathetic resonator engine
• Pitch Tracking Range: C2 to B5
• Interval Offset: Fixed interval offset from unison through major 7th
• Modulation Modes: Selectable chorus and vibrato with per voice detune
• Controls: Adjustable input sensitivity and feedback sustain
• Octave: Adjustable octave window for harmonic re voicing

Connectivity and Control

• Audio Jacks: 1/4" TS, instrument or line level compatible
• Input Impedance: 1 MΩ
• Output Impedance: < 1 kΩ
• Bypass Modes: Analogue buffered or DSP trails
• Footswitches: Soft touch
• MIDI: 3.5 mm MIDI input (Type B) for full parameter control and preset storage (9 slots)

Power and Physical

• Power Supply: 9 VDC, centre negative
• Current Draw: 200 mA
• Enclosure: Single block of walnut, CNC routed, hand sanded and polished
• Dimensions: 165 mm x 140 mm x 45 mm