GFI System Solis Ventus

The GFI System Solis Ventus is a dual-engine digital delay and reverb pedal that runs two algorithms at once, in any pairing and either order. You can stack delay into reverb, run them in parallel, or use them independently in dual mono channels, and swap the engines around on the fly¹. It replaced the Specular Tempus in GFI System's lineup in December 2024, in a larger workstation format².

GFI System's product page lists 16 delay algorithms, 11 reverbs and 96 presets¹. When the pedal launched, Guitar Pedal X counted 15 delay algorithms and 9 reverbs³, so the algorithm count has grown since release. The pedal carries a list price of USD 549.00 on GFI System's page as of October 2026, with a Solis Ventus and Triple Switch bundle at USD 599.00¹; at launch in December 2024 the price was $499³.

The controls and footswitches

The pedal has three footswitches: A/Y (Bank Down), B/X (Bank Up) and Control / Tap Tempo². Each side of the pedal has its own control set. The Y side carries Param, Time, Algo (with Globals, Swap and Save functions) and Mix / Dynamics. The X side carries Algo (with Options, Swap and Save), Time, Param, the XOV crossover control and Mix².

A special Stompbox Mode dedicates one footswitch to the on/off state of each engine, effectively turning the pedal into two separate stompboxes, while Preset Mode is aimed at live use, flipping between presets with your favorite delay and reverb pairings¹⁵.

For players who want more physical control, the pedal accepts up to 3 external aux switches for functions like bank up and down and tap tempo¹, and there are two expression pedal inputs with CV compatibility¹.

Power and connections

The Solis Ventus runs on 9V DC at under 350mA with a center-negative plug, and the power supply is not included¹. That current draw is well above what a typical 9V battery or a low-current daisy chain output can supply, so it needs a dedicated isolated output or a supply rated for it.

Connections are 1/4 inch TS for both input and output, with MIDI Input and MIDI Thru on 1/4 inch TRS jacks¹. Nearly all of the pedal's features and functions are opened to MIDI access¹. The pedal handles both instrument and line level signals, with a maximum input level of +7.23 dBV (9.45 dBu, 6.5 Vpp), input impedance of 1 MOhm and output impedance of 500 Ohm¹⁴. Conversion is 24-bit at 40 KHz, with a typical signal-to-noise ratio of 115 dB and a volume trim of plus or minus 3dB¹. The enclosure measures 17 x 12 cm (6.7 x 4.6 inch)¹.

The two engines and the crossover filter

The two engines can be routed in series, parallel or dual mono⁵⁴. Beyond simple routing, a switchable crossover filter splits the input signal into two frequency bands, one routed to DSP X and the other to DSP Y¹. GFI System notes you can even modulate the crossover's cutoff frequency via MIDI¹. Independent dynamics processing engines, placed after each DSP, apply ducking or gating to any delay or reverb algorithm¹.

The delay algorithms listed at launch included Analog Delay, Lo-Fi Delay, 3-Heads Delay, Ambiental Delay, Dual: Digital-Pitch, Tape Echo, Modulated Delay, Ping-Pong Delay, Dual: Digital-Digital, Diffuse Delay, Digital Delay, Filter Delay, Android Delay, Dual: Digital-Analog and Reverse Delay². The reverb list included Aether, Plate, Marble Room, Echo Chamber, Spatium, Modeled, Spring, Shimmer and Tremble reverbs².

The looper

The Solis Ventus includes a 40-second stereo looper⁵⁴, something the Specular Tempus never had⁴. The playback effects cover standard and experimental applications, from speed manipulation and sound reversal to an ever-increasing pitch transposition¹. Delicious Audio describes an Ascend Dub mode that gradually increases the loop's pitch⁵.

From the Specular Tempus to the Solis Ventus

The Solis Ventus is GFI System's replacement for the Specular Tempus, launched in December 2024 in a larger workstation format². GFI System says the entire algorithms library from the Specular Tempus was brought back, improved and expanded for the Solis Ventus¹. The comparison is direct: where the Specular Tempus was a single-engine pedal with 32 presets, no looper and instrument-level-only inputs, the Solis Ventus is dual-engine with 96 presets, a looper and line-level compatibility⁴.

On That Pedal Show, the Specular Tempus was called "sounds amazing", with the pedal described as extremely cool, small, easy to edit and great for soundscape and movie-style sounds⁶. The Solis Ventus replaces the Specular Tempus in a larger workstation format, with much more onboard.

Firmware and the SV Studio editor

The current firmware is version 1.8.18, dated September 16, 2026, which improved the Lowpass mode in the FILTER delay algorithm⁷. Updating is a short process:

1. Hold both the A and C footswitches and plug in power; the screen shows firmware update mode⁷.
2. Connect the pedal to your computer with a USB Type C cable⁷.
3. Update through the SV Studio editor⁷.

SV Studio is GFI System's editor software for Windows and macOS, offering an easier way to manage presets, assign expression parameters and adjust every detail of the pedal's settings¹. Firmware v1.8.0 or newer requires SV Studio Editor 1.6.0 or newer⁷.

What reviewers said

Guitar Pedal X's Stefan Karlsson reviewed the pedal at launch and placed it in context against its competition²³:

The reviewer placed the Solis Ventus in the same territory as the Source Audio Collider and Wampler Catacombs, but with much more onboard and in a significantly larger enclosure². In Guitar Pedal X's selection of spatial and time-based effects, the Solis Ventus took the runner-up spot, with the reviewer calling it "well worth the wait, and a worthy runner-up winner for this selection"³.

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