The Seafoam+ is a chorus and vibrato pedal with an awesome doubler function which is featured on their 30ms Double Tracker pedal as well as a reverb function on board.
Its got a deep lush chorus that can be wide and almost ambient with the Space knob but can also be subtle and controlled by keeping Space and Dry/Wet signal down.
It has multiple functions that will all give you different controls.
ADT stands for automatic double tracker and is the true chorus mode. You can add a double tracked guitar so that it sounds like more than one person playing to just add width to your riffs.
The seafoam setting is classic chorus/vibrato where you can control the rate and depth to be fast and stuttery or long and lush. Internally you have access to a dipswitch that can allow you to add high end sparkle, or vintage warmth depending on your preference.
This setting is for more experimental modulation sounds. Your high frequencies will be effected by the Depth control and the low frequencies will be effected by the SPace control. By splitting your signal up, you end up with a massive wide chorus effect that you can use in many different ways. Combine it with a delay for the ultimate ambient tones.
The other dipswitch on the inside will make the pedal bass friendly where it focuses on enhancing the lower frequencies.
Here's what Keeley say about the Seafoam+
Keeley Engineering is changing the minds of even the most picky players… again.
We redefined chorus. There is a new style of chorus that actually sounds RIGHT.
We are proud to announce the all new Seafoam Plus Chorus – True Chorus and ADT with Reverb. It will forever change the way you think about chorus, because we have developed a new type of chorus that until now has only been available in expensive DAWs and in studios. Not only is it tuned for guitar, but there are voices and modes created specifically for bass players including flanging and tremolo. Lastly, this tri-mode chorus pedal offers internal switching for vintage and modern tones, further doubling the amount of sounds you can get.
ADT: THE NEW DEFINITION OF CHORUS. In the Seafoam Plus Chorus you get the automatic doubler that we developed in the revolutionary 30ms Double Tracker. Our ADT chorus is what we call True Chorus, because we create a second and third voice–like singers in a choir. Not only do they sing at different times, they sing at different pitches. True Chorus.
Seafoam Mode: You guessed it… the all new Seafoam Plus Chorus–lush, wide, and with a very musical vibrato. It gives you the lush sounds and tone of a vintage BBD analog chorus unit. This is where you’ll find a typical chorus feature. The Seafoam Mode of the pedal has an LFO, the regularly cycling part you hear in most every other chorus unit. It provides a classic tone that you expect and which has become part of many classic tunes. Set the rate for slow and the depth for wide, and enjoy a really spacious sounding chorus. Roll the Mix Control all of the way up for Vibrato. With the Space control acting as a Tone Control in this mode, you can go from bright to vintage warmth, dialing in the perfect chorus.
Dual Chorus Mode: We created a frequency crossover-based dual-chorus engine. Imagine a dividing line that is centered on your high E-string. Control the depth of chorus independently for highs and lows. Craft the ultimate “Come As You Are” Nirvana of chorus tones. Create a very deep, throbbing chorus on the low end, and a near perfect calm on the top end. Or make the high-end and shimmer and waver while keeping the low end fixed!
OK, it goes twice as deep. The Seafoam Plus Chorus is a Bass Chorus, Flanger, and Tremolo too! Pop off the back, flick a switch, and it’s a bass guitar player’s dream. The Space Controls gives you controls or Regeneration, High-pass filtering to keep things tight, and a haunting Tremolo you have to hear to believe! o let’s get down and funky, Michelangelo!
Vintage at Heart
Want a softer tone? Chorus that’s silky smooth and warm? No problem. Internal switching puts it in “Vintage Mode.” The Keeley Seafoam Plus Chorus ships in “Modern Mode” for ultra wide, lush, and high-fidelity chorus. Either way, enjoy sounds that are downright frighteningly good. Makes you wonder, “Is that my fingers playing that tone?!?”!