The Mosky Blue Delay is a mini analog delay pedal from Moskyaudio, model number MP-31, in a blue enclosure. Moskyaudio's product page describes it as a mini version of the Mad Professor Deep Blue Delay, with the same three-knob control set and the same 25 to 450ms delay range, in a much smaller box1.
The maker lists it as 100% analog circuitry with true bypass switching, powered from a 9VDC supply with a negative tip1. For a player who wants a simple, short-to-medium delay with runaway repeats on tap, the three knobs cover the whole job.
The controls: Level, Delay and Repeat
The Blue Delay keeps the Deep Blue Delay's three-knob layout, and Moskyaudio describes what each one does1.
| Control | What it does |
|---|---|
| Level | Sets the level of the delayed signal mixed with the straight guitar tone. Fully counterclockwise, only the un-effected guitar signal is heard; fully clockwise gives the loudest delay. |
| Delay | Sets the delay time from 25ms fully counterclockwise to 450ms fully clockwise. |
| Repeat | Controls the repeats of the delay signal. Fully counterclockwise gives one repeat; fully clockwise gives infinite feedback. |
The Repeat knob is the one analog-delay players will care about most: with infinite feedback at the clockwise extreme, the repeats build on themselves and the pedal will self-oscillate, so the knob can be ridden for swelling, runaway repeats and then pulled back to tame them1.
Power
The Blue Delay runs on 9VDC with a negative tip, and Moskyaudio recommends a regulated supply1. That is the standard center-negative arrangement most pedalboard power supplies provide, so it fits a typical daisy chain or isolated supply setup.
How it relates to the Mad Professor Deep Blue Delay
Moskyaudio's product page states plainly that the pedal is based on the Mad Professor Deep Blue Delay and is a mini version of it1. The family resemblance is easy to see. Guitar World's review of the Deep Blue Delay lists the same controls, Level, Delay and Repeat, plus a bypass footswitch, the same 25ms to 450ms delay time, true bypass, and standard input and output connections2. MusicRadar's review likewise notes the delay control sweeps from 25 milliseconds up to 450 milliseconds3.
There is one clear difference in how the two are described. Moskyaudio lists the Blue Delay's effect type as analog delay and describes 100% analog circuitry1, and the pedal comes in a blue enclosure weighing 125g1. A player comparing the two should check each maker's own description of its circuit before deciding which suits their board.
On size, the Blue Delay is a compact mini pedal. Moskyaudio lists its weight at 125g1. The Deep Blue Delay is a full-size enclosure, so the Blue Delay fits a crowded pedalboard where a full-size box would not.
Moskyaudio's own site gives the Blue Delay's weight as 125g and lists its color as blue1.
What reviewers said about the original
Since the Blue Delay follows the Deep Blue Delay's design, reviewers' verdicts on the original are a useful reference for what this format of delay is meant to do. Guitar World's reviewer found the range covered everyday delay work well12:
"There aren't the huge long delays you'd get from some pedals, but most (or maybe all) you'd need a delay pedal to do can"
MusicRadar's review team notes that Mad Professor designed the Deep Blue Delay "to replicate the warm sounds of classic tape-based echo units of the '60s"3. Players wanting longer delay times from the same family can look at the Mad Professor Dual Blue Delay, which Gearnews reported offers a tape-style short delay plus a long modern delay with up to 810ms of time.
Videos
northtownsound
Ryan Lutton
No Fear Guitar Gear
Questions
Is the Mosky Blue Delay true bypass?
Yes. Moskyaudio lists the Blue Delay with true bypass switching, so when the pedal is off the guitar signal passes through without the circuit coloring it. The maker describes it as 100% analog circuitry with true bypass switching.
Is the Mosky Blue Delay fully analog?
Moskyaudio describes the Blue Delay as 100% analog circuitry and lists its effect type as analog delay. That is a point of difference from the Mad Professor Deep Blue Delay it is based on, which the press describes as a digital delay.
What is the delay time range of the Mosky Blue Delay?
The Delay knob sets the delay time from 25ms fully counterclockwise to 450ms fully clockwise, according to Moskyaudio's product page. That is the same 25 to 450ms range Guitar World lists for the Mad Professor Deep Blue Delay.
Is the Mosky Blue Delay a copy of the Mad Professor Deep Blue Delay?
Moskyaudio's own product page says the pedal is based on the Mad Professor Deep Blue Delay and is a mini version of it. The control layout, Level, Delay and Repeat, matches the Deep Blue Delay's three knobs as reviewed by Guitar World.
How big is the Mosky Blue Delay?
Moskyaudio lists the dimensions as 92mm wide by 38mm deep by 36mm high, with a weight of 125g. A second listing on the maker's site gives 94mm by 39mm by 32mm. Either way it is a mini-format pedal.
Can the Mosky Blue Delay self-oscillate with infinite repeats?
Yes. Moskyaudio says the Repeat knob gives one repeat fully counterclockwise and infinite feedback fully clockwise, so cranked repeats will run away into self-oscillation the way an analog delay does.
Sources (3)
- Blue Delay_Mini Guitar Pedals_Effect Pedals_Products_mosky pedal, moskyaudio.com
- Mad Professor Deep Blue Delay review, Guitar World, 2024-02-01
- Mad Professor Deep Blue Delay review, MusicRadar, 2011-03-31
