Source Audio One Series True Spring Reverb with Tap Tempo Switch. Does a great outboard Fender Reverb Tank sound. The Reverbs are great, but the Tremolo adds so much more. Many variables can be changed with editing with PC or smartphone.

From Source Audio:
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. Our 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 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. But it gets even better! You also receive a Tap Tempo Switch!

The Source Audio Tap Tempo Switch is a simple footswitch that adds significant functionality to every One Series pedal in the Source Audio collection. It offers on-the-fly tap tempo control over modulation rates for the Vertigo Tremolo, Lunar Phaser, Gemini Chorus, and Mercury Flanger as well as delay times for the Nemesis Delay. The Tap Tempo also makes it possible to externally scroll through presets on the Nemesis Delay, toggle between distortion engines on the L.A. Lady Overdrive, Kingmaker Fuzz, and AfterShock Bass Distortion, or render virtual knob changes to every One Series pedal. In addition, the Switch has a standard 1/4” output for use with compatible third-party products (normally open [NO], single pull/single throw (SPST)).

  • Three Distinct Spring Reverb and Tremolo Effects.
  • Two Modes of Operation – Use the pedal in Standard Mode for a classic (non-preset) stompbox experience or turn on Preset Mode and save a user preset (including reverb/tremolo effects and knob positions) to each of the three toggle switch positions.
  • Flexible Stereo Routing – The True Spring is equally at home in a mono or stereo rig. The pedal’s stereo inputs and outputs offer a variety of routing options such as Stereo to Stereo, Mono to Mono, Mono-to-Stereo, Stereo Sum-to-Mono and External Loop Mode.
  • Universal Bypass — Select Active Analog (Buffered) or True Bypass.
  • Secondary Tremolo Controls – Press and hold the CONTROL INPUT button to access the True Spring’s tremolo effects (DWELL knob controls tremolo DEPTH / TONE knob controls tremolo RATE / toggle switch selects tremolo type).
  • Expression Control — Compatible with Source Audio expression pedals and the Hot Hand 3 Universal Wireless Effects Controller. Assign up to three simultaneous parameters with editable depth and direction.
  • External Tap Tempo – Use the Source Audio Tap Switch to tap in the tremolo rate with a choice of four different beat divisions (quarter, eighth, triplet, and sixteenth).
  • External Tremolo Engage and Bypass – Use the Source Audio Tap Switch to engage or disengage the tremolo effects on top of an active spring reverb.