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The Mad Professor Deep Blue Delay was conceived as an ambient delay : a simple, musical, and immediately inspiring effect, with a bandwidth and decay reminiscent of classic tape echoes. The choice of digital processing for the repeats is not a "cold" compromise: it allows achieving the typical grain and consistency while maintaining a compact format and a more accessible price than a much bulkier analog equivalent.
Another strong point: the dry signal path is deliberately short and fully analog, without unnecessary filtering. As a result, as long as your input level stays within a "normal" range, the pedal adds no saturation or unwanted coloration to the original sound: your guitar and amp remain front and center.
The Deep Blue Delay is aimed at guitarists who want a plug-and-play delay, without menus, tap tempo, or superfluous options. Its natural playground: blues, rock, indie, pop, garage, funk, and all contexts where you want to thicken the sound, create depth, or give a sense of space without masking the playing.
Live, it is perfect for leaving a discreet slapback on permanently or to support a lead with two or three well-measured repeats. In the studio, its transparency on the dry signal and consistent behavior on repeats make it an excellent tool to double a part, set an atmosphere, or stabilize a rhythmic delay "by ear."
The Deep Blue Delay goes straight to the point with three potentiometers. The Delay control sets the repeat time between 25 ms and 450 ms, covering both short echoes and wider ambiances. The Repeat control manages the amount of feedback: from a single repeat to infinite feedback for pads and textures. Finally, Level adjusts the mix between the dry sound and the effect, allowing you to go from a very background delay to a clearly present delay.
The repeats are crafted with filtering designed to allow extreme settings while remaining clean and usable, without annoying interference. Most importantly, the pedal is known to hold up well with saturated sounds, where many delays become muddy: you can use it before distortion (for a more "old school" feel) or after (for clearer repeats), depending on your approach and pedalboard.
The Deep Blue Delay's sonic signature is a warm and natural ambiance, with repeats that blend into the sound rather than highlighting it. With the dry signal remaining analog, you retain a crisp attack, intact dynamics, and excellent response to right-hand nuances and guitar volume. The repeats evoke a vintage echo : a sense of depth, controlled bandwidth, and musical decay that helps "stick" to the track.
Regarding pedalboards, this approach has attracted musicians from varied universes: Albert Hammond Jr (The Strokes), Eddie Clarke (Motörhead), Rebecca Lovell (Larkin Poe), Matt Schofield, Marc Ford (The Black Crowes), and Vigilante Carlstroem (The Hives). A good indicator of its versatility: it stays subtle in rhythm parts and becomes expressive in leads, without ever complicating the guitarist's life.
