Electronic Audio Experiments Prismatic Wall Sympathetic Resonator Guitar Effects Pedal

Sympathetic Resonator for Expansive Sonic Textures - The Electronic Audio Experiments Prismatic Wall Sympathetic Resonator Guitar Effects Pedal

Prismatic Wall is a sympathetic resonator designed to transmute incoming sounds into the vibrations of an illusory bank of tuned strings. Part reverb and part synthesizer, its metallic yet warm timbres span from the subtle harmonic aura of a third bridge to the rich chromatic suspensions of a grand piano. The simulated vibrations form a sustaining spectral extension of your instrument that retains a tangible physicality despite its surrealist underpinnings. The resonances are reactive in nature: playing in tune excites specific pitches, while percussive attacks excite all the strings in tandem.

• Analog/digital hybrid signal processing (24 bit, variable sample rate) paired with analog filtering and emphasis, for low noise with a colorful character
• High headroom analog dry path and mixer
• Comprehensive digital control of every function using a 32-bit processor system that seamlessly integrates with the analog signal path
• Performance-friendly expression morphing functionality with intelligent momentary/latching behavior and adjustable rise/fall times
• Full MIDI implementation (CCs and presets) for all parameters, analog and digital
• 16 preset slots: 3 via the front panel, the rest via MIDI
• CTRL jack for MIDI, expression, and CV input
• Multi-mode, assignable LFO with periodic and random waveforms
• Updatable firmware via MIDI Sysex messages

Prismatic Wall utilizes a physical string model formed by tuned delay lines. Tuning is achieved by varying the sample rate of the system, manipulating the physical model in decidedly non-physical ways. The Mode selector determines the interval spacing between strings, with each configuration carefully selected to maintain a sense of harmonic ambiguity. Damping and Decay change the brightness and sustain of the strings, ranging from short plucks to infinite drones.

The hardware combines primitive DSP with analog saturation and filtering for a sonic character untethered from a particular era. A fully digital user interface enables all parameters to be controlled via MIDI, saved as presets, and even modulated by the onboard LFO. In addition, the Morphing function enables controllable transitions between two distinct settings via the Aux footswitch or an expression/CV source.

Prismatic Wall is a distinct instrument in its own right, a device that refracts musical intent into multifaceted harmonic colors. Will you traverse its intricate layers?

SPECIFICATIONS

General

• Bypass switching: Electronic bypass with buffered or Trails modes
• Input impedance @ 1kHz: 1MΩ
• Output impedance @ 1kHz: 1kΩ
• Power: 9VDC, 2.1mm center negative barrel. Current draw is 120mA max

Controls

• Tune: adjusts the pitch of the resonators across a four octave range
• Mix: wet/dry blend
• Drive: sets the signal level driving the resonator, with overload at higher settings
• Damping: high frequency decay of the resonators
• Decay: overall decay time of the resonators; at its upper range also adds analog feedback to create infinite drones
• LFO Rate: LFO speed; modulates Tune by default
• LFO Amount: LFO amplitude
• Mode Button: selects between four string spacing modes: single w/ harmonic overtones, stacked neutral thirds, stacked fifths, and chromatic
• Wave Button: selects the LFO waveform between periodic and random modes. Long press to access the Mod page.
• Engage Footswitch: activates the pedal. Long press to toggle trails/standard bypass modes.
• Aux Footswitch: the footswitch behavior depends on the Aux button setting. In Morph mode, Aux will jump between two distinct knob settings with intelligent momentary/latching behavior. In Preset mode, Aux will scroll through the first three presets.
• Aux Button: determines the behavior of the Aux footswitch. Long press to access alt functions, and press again to return to the panel.

We are Chuck Levin's Washington Music Center

Since 1958, Chuck Levin’s Washington Music Center has been the trusted destination for musicians and audio professionals across Maryland, Virginia, and Washington, D.C. Family-owned and operated, our legendary music store delivers Everything in Music®—from instruments and recording gear to pro audio, rentals, and repair services.

Our team of musicians and industry experts lives and breathes gear, helping you build the perfect setup for your next performance, studio session, or installation. As an authorized dealer for top brands, we also offer our award-winning CHUCKSCLUSIVE line—exclusive, limited-edition instruments and collaborations recognized with the NAMM Top 100 Dealer Innovation Award for redefining what a music retail experience can be.

Chuck Levin’s isn’t just a store—it’s a community built by players, engineers, and creators who share a lifelong passion for sound. Stop by our legendary Wheaton, MD showroom or contact us anytime for expert advice, product questions, or the best possible deal on your next piece of gear.