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Turn on to the vintage charm of natural spring reverb coupled with  pulsing tremolo. Source Audio doesn’t depend on the off-the-shelf reverb  effects processors found in many modern reverb pedals, we meticulously  craft every one of our proprietary effects engines and load them to  high-powered, 56-bit Sigma DSP. Source Audio’s two man engineering team  of Bob Chidlaw and Jesse Remignanti put years of collective man-hours  into capturing every nuance and idiosyncrasy of the spring reverb and  tremolo effects from some of the music gear industry’s most iconic  guitar amps and outboard gear. The result is indisputable sound quality  with magnificent tonal depth and precision.

The Spring Reverbs

The True Spring’s reverb effects are based on a mechanical design  originated by the Hammond Organ Company™ in the late 1930s. This stark  design uses a pair of input and output transducers to inject an  instrument’s dry signal into an actual set of spring coils and capture  the very distinct reverberations as the sound bounces back and forth  within the springs. Of course, Leo Fender adopted this design in the  1960s with the some of his “blackface” amplifiers and a revolution was  born.

• ​Short Spring Reverb: Modeled after the unmistakable twang of  “blackface” amplifiers of the 1960s. After extensive research we found  tremendous diversity in the spring reverb sounds of a variety of amps.  Some offered a tighter, less animated tone while others sounded  “drippier,” with longer sustain and livelier reverb trails. The SHORT  Spring reverb engine offers a taut sound with a quick decay and smooth  trails.
• Long Spring Reverb: Produces long and deep reverb decays with  noticeable “drip” and highly animated trails. The LONG Spring engine is  not as dramatic as the TANK Reverb engine, but does offer an extremely  authentic representation of some of the livelier reverb tanks found in  vintage combo amps.
• Tank Spring Reverb (Outboard Spring): Captures the unmistakable  effect of the tube driven outboard spring tanks of the 60s. The sound of  reverb tanks like the classic Fender 6G15™ are characterized by their  “drippy” attack and animated trail. This original two-spring design  produces a bouncing, delay like sound inseparable from the early days of  surf rock and spaghetti western soundtracks.

The Tremolos

The True Spring Reverb also allows you to combine any of its iconic  spring reverbs with any of the pedal’s three tremolo effects. The True  Spring’s tremolos are the same organic effects that originally appeared  in our Vertigo Tremolo – the winner of Guitar Player’s “Hall of Fame  2015” and Premier Guitar’s “Premier Gear Award.”

• Opto Tremolo: Optical tremolo (a.k.a. “Photocell Tremolo”) is the  effect found in many combo amps of the 1960s. This version of tremolo  relies upon a neon light bulb and a light dependent resistor called an  “optocoupler.” The non-symmetrical aspects of the light and the  optocoupler give the tremolo a distinct choppy character.
• Harmonic Tremolo: This unique effect first appeared  in Fender™  “brownface” amps made between 1959 and 1963, which  alternately modulated the levels of bass and treble frequencies in the  audio signal. The result is a very pleasing and complex tremolo that has  characteristics reminiscent of a phaser.
• Bias Tremolo: This approach to tremolo involves using an LFO to  modulate the bias voltage of the tubes in an amplifier. This essentially  pushes the tubes in and out of saturation. The result is a smooth  amplitude modulation with a mild overdrive created by the tube  saturation.

Out  of the box, the True Spring Reverb couldn’t be simpler – just plug it  in, select from the three onboard reverb engines, dial in some tremolo  if you like, and start making beautiful music. But something deep and  powerful resides just below the surface – the truly “Big Idea” behind  all of our One Series pedals is the second, far deeper, set of options  and editing tools for crafting the perfect tone. The Neuro Mobile App is  available for free at the App Store (iOS) and Google Play (Android).  The Neuro Desktop Editor is available as a free download for Mac or  Windows systems on our Downloads page. These powerful editing tools  offer an advanced collection of deep editing parameters. After  customizing your sound, burn it directly to the pedal and easily access  it anytime without having to reconnect the Neuro Mobile App or Neuro  Desktop Editor.