Lush, tape-like, saturated delays with adjustable modulation and an infinite-repeats footswitch

The Skreddy™ Echo Infinity takes my classic Echo circuit and incorporates all the most popular mods that my customers have asked for over the years.

  1. The 'mix' mod which keeps the dry signal at unity gain throughout the sweep of the mix knob
  2. The 'trails' mod which allows the delay signal to degrade naturally when you engage the bypass switch (note: this also means that the Echo Infinity features active bypass instead of true bypass, which is a good thing because my dry signal sounds nearly identical to a straight wire but is a better signal that will combat noise and capacitance from low-quality patch cables compared to true bypass)
  3. The 'infinity' mod which is a momentary footswitch that sets the repeats intensity to the the corresponding knob setting for as long as you hold down the switch
  4. Also I found a resistor in my original design that darkens the signal a bit more than needful and reduced that value, giving the delay signal a more articulate tone.
  5. The height of the enclosure has been reduced by 1", and the effects loop and trimpots have been eliminated.

The repeats degrade very gradually into a musical, harmonic soup if you turn them up high enough or hold down the Infinity switch.  Self oscillation is possible (though not in a touchy or unpredictable way) without the bothersome runaway volume some old analog delays have.

Ultra-High Sample-Rate (Delta-Sigma) Digital Delay with Analog Filtering and Limiting

Transparent, Analog "Dry" Path with Tons of Headroom

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Get Lost in Your Playing Again

Great classic tape delay tones (~50ms -- ~550ms) with as much or as little warble as you like

Sounds equally great clean or with overdrive, distortion, or fuzz in front

Huge range, including slap-back, atmospheric, cathedral/stadium, self-accompanying rhythms, expansive delays, self-oscillation, vibrato-chorus-detuned effects, etc.

Size: 5" long x 4" wide x 2" tall (including jacks and knobs)


DC power supply must have a standard 5.5mm barrel x 2.1mm center coax > Polarity: negative center (industry standard) -- for example, a Boss™ or Roland™ or Digitech™/Harman Pro™ 9vdc power supply.

Amperage: you will want to supply a minimum of 100 ma (Note: it will not actually draw 100 ma; this just provides a generous surplus which insures that no variations in supply voltage will be carried through the circuit from the LFO sweep--and this is not important at all unless you are trying to dial out every bit of pitch-shift modulation). Actual current draw is only about 26mA. Do not use an AC power supply DC power only




Robert Muiňos
Producer - Mixer - Musician

Thanks Marc,

I’ve owned over 20 delay pedals over the last 20 years and tried many more.
I think this one is my favorite.
It just kicked an old Ibanez AD80 off my board.
The way you’ve voiced the repeats and the functionality of the infinity
circuit is perfect.
I’ve added an infinity repeats switch to all my delay pedals for a while
now. AD-9, AD-900, DM-3, Aqua Puss etc. but because all I’ve ever done is
jumper the feedback pot with a momentary switch it’s been a bit hit and
miss, and the switch wouldn’t work in the repeats pot was set to zero
(which is where I often like it).

Anyways, just wanted to say I think you’ve nailed it with this one and I
really appreciate you getting all the minor details right. For my taste,
it’s the best delay pedal on the market

Thank you!



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