Diamond Pedals Memory Lane Modulated Delay (STM32 edition)

The Diamond Pedals Memory Lane Modulated Delay (STM32 edition) is a reboot of Diamond Pedals' modulated delay pedal, announced in October 2025. It keeps the character of the earlier Memory Lane but moves the delay engine onto an STM32 Arm processor, which extends the delay time to 2.4 seconds, lowers the noise floor, and adds headroom, all in the same compact enclosure¹².

At its core is what Diamond calls its digital Bucket Brigade Delay (dBBD) architecture: a system that blends analog companding, precision filtering, and a custom-voiced delay line². Guitar Pedal X describes it as a BBD-style circuit using three distinct delay lines paired with analog companding and anti-aliasing and reconstruction filters, so it is "very much still a BBD-style Delay, but now loaded with a superior fidelity STM32 Arm Processor"¹. Diamond positions it as a pedal that "captures the lush warmth of classic analog delays with the clarity, control, and reliability of modern digital design"².

A BBD-style delay on an STM32 processor

A traditional bucket brigade delay (BBD) chip passes your signal along a chain of capacitors, one step at a time, which is what gives classic analog delays their warm, darkening repeats. The Memory Lane STM32 edition recreates that behavior digitally: the STM32 Arm Cortex processor runs the delay line, while the surrounding circuit keeps analog companding (compressing the signal on the way in and expanding it on the way out, a technique real BBD pedals use to manage noise) plus anti-aliasing and reconstruction filters¹³.

Diamond describes the result as a system blending "analog companding, precision filtering, and a custom-voiced delay line"². Gearnews characterizes the pedal as built with industrial-grade converters, warm analog circuitry, and robust protection against electrical mistakes, and says it is voiced to sit musically behind your playing³.

The delay range spans 25ms to 2.4 seconds², with what Guitar Pedal X calls "lush, modulated repeats" at the long end¹.

The four modes

The Tap/Mode control selects between four delay modes¹³:

The earlier revival-phase Memory Lane carried three modes (Modern, Warm, and Vintage); the STM32 edition replaces them with these four, keeping only Vintage¹.

Two further behaviors shape how the modes work in practice:

• Auto Div: automatically doubles or halves a tapped-in delay tempo if it falls outside the current mode's time range¹.
• Doubler feature: allows instant doubling of the delay tempo¹.

There is also a Geezer Mode, which mimics classic Memory Lane operation by turning off the secondary footswitch functions, for players who want the pedal to behave like the original¹.

The controls and footswitches

The front panel keeps the Memory Lane layout: Mix, Feedback, Delay (up to 2400ms), and Modulation knobs control the primary delay functions, with the Tap/Mode control for mode selection¹³.

Two footswitches handle the rest: an On/Off footswitch and a Tap / Double footswitch, the latter giving you a dedicated tap tempo switch¹³. A Momentary/Latching mode offers momentary or latching switching for both the delay modulation and the Doubler feature, so you can, for example, hold a switch to engage an effect only while your foot is on it¹.

How it differs from the earlier Memory Lane

Superficially the STM32 edition looks like its predecessor, with a burgundy accent color in place of the old black one¹. Inside, the changes are functional rather than cosmetic:

• An STM32 Arm processor replaces the earlier engine, for extended delay range, lower noise, and more headroom¹
• Four delay modes instead of the previous three¹
• The same compact, pedalboard-friendly format as the revival-phase version⁴

Guitar Pedal X's verdict on the update: "In short an already great modulated vintage sounding delay is now significantly better."¹

Power and build

The pedal runs on a regular 9V DC power supply, center negative, 2.1mm, drawing about 50mA¹². Diamond's specification allows 9 to 15V DC, negative tip, through a 2.1mm barrel jack².

All Diamond pedals are designed and built entirely in the company's own shop in Montreal, Quebec, Canada², which Guitar Pedal X describes as hand-made in Montreal¹. The STM32 edition was priced at $259 when announced in October 2025, with orders open direct and international dealer availability to follow¹. A Limited Maple Leaf Edition of the same circuit shares these specifications⁴.

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