The BOSS DD-2 Digital Delay, made by Boss, holds a specific place in pedal history: released in 1983, its hardware was the world's first digital delay in stompbox form1. Before it, digital delay lived in rack units; BOSS crammed the technology into a pedal that could sit on a board. Guitar World calls it the first stompbox digital delay23, and MusicRadar's Michael Astley-Brown puts it plainly: "Back in 1983, Boss was the first company to cram the miracle of digital delay into a stompbox with the DD-2"3.
What a player gets is a delay with a maximum time of 800 milliseconds and what BOSS's Jim Bybee describes as a "clear-yet-warm tone"; in his words, "the pedal was an instant smash and a must-have item"4. BOSS still lists it among its effects today, saying "the DD-2 is still loved for its warm 12-bit tones that sit perfectly in the mix"5.
Where it came from
The DD-2 did not appear from nowhere. At its heart was a dedicated delay chip originating from the acclaimed Roland SDE-3000 Digital Delay rack unit, as BOSS's Rod Brakes tells it8. Guitar World adds the detail: the DD-2 contained the same 63H101 CMOS gate array IC, the "long chip," as the SDE-30007. BOSS's history of its delay pedals, again with Jim Bybee speaking, notes that fitting the rest of the electronics in and powering them all with a 9-volt battery were the formidable steps that followed the chip itself4.
The circuit was not purely digital. As Rod Brakes describes it for BOSS, "The circuit itself was a clever hybrid of analog and digital. An important analog component, the compander, softened the attack of feedback sounds"8. The pedal also ran a narrower bandwidth than the rack unit it came from: Guitar World gives a frequency response of 10Hz to 8kHz, compared to the SDE-3000's 17kHz upper range7. BOSS describes the DD-2's 12-bit resolution as lending "warmth and musicality that sat beautifully in a mix," with a "vintage digital" frequency response of 40Hz to 7kHz among its features8. Guitar Pedal X's Stefan Karlsson dates the pedal to 1983 in his survey of BOSS's early pedals9.
Controls and Hold mode
The front panel is simple, with only four knobs: effect level, feedback, delay time, and delay mode7.
| Control | What it does |
|---|---|
| Effect level | Sets the level of the delayed signal7 |
| Feedback | Sets the number of repeats7 |
| Delay time | Sets the delay length, 12.5 to 800 milliseconds7 |
| Delay mode | Selects the delay mode, including Hold7 |
Hold mode is the DD-2's most distinctive trick. Guitar World explains: "When the Hold mode was selected, the pedal would infinitely repeat a short section as long as the footswitch was held down," providing a primitive looper function7. BOSS likewise lists "a versatile Hold function" among the pedal's features8.
The DD-2 draws 65 mA at 9V DC center negative6. A pedal drawing that much is beyond what many daisy-chain supplies handle comfortably, so plan power accordingly.
The DD-2 and the DD-3
The DD-2's circuit did not end with the DD-2. Guitar World's history of the two pedals ties them together: the DD-2 and the DD-3 share the same long chip lineage from the SDE-3000, and the DD-3 carried the design forward as BOSS's continuing digital delay7. Guitar World's verdict on the pair's standing: "it seems almost everyone who is anyone has used a DD-2 or DD-3 at some point in their careers"7. For players tracing the line forward, the DD-2 sits at the start of a family that runs through the DD-5, DD-7, DD-8 and DD-500, and BOSS has since revisited the SDE-3000 itself with the SDE-3.
Standing among players
The DD-2 still turns up in rankings of digital delays. Vertex Effects placed it at number 2 in its author's top 5 digital delay pedals in 202110. Between the first-of-its-kind history, the SDE-3000 chip, and the Hold function, it remains a reference point in delay pedals more than forty years on.
Videos
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Questions
How long is the delay time on the BOSS DD-2?
The DD-2 offers delay times from 12.5 to 800 milliseconds, which Guitar World notes was longer than the times offered by analog delay pedals of the era. BOSS's own history of its delay pedals describes the 800 millisecond maximum as a key reason the pedal became, in the company's words, an instant smash when it arrived.
Is the BOSS DD-2 analog or digital?
The DD-2 is a digital delay pedal, and it was the first of its kind: released in 1983, its hardware was the world's first digital delay in stompbox form. That said, the circuit is a hybrid. BOSS describes an important analog component, the compander, which softened the attack of feedback sounds, and RockBoard's PedalPedia lists the circuit type as analog, so descriptions differ between references.
Can the DD-2 run on a 9-volt battery?
Yes. BOSS's history of its delay pedals notes that fitting the electronics and powering them all with a 9-volt battery was one of the formidable steps in getting digital delay into a stompbox. The pedal runs on 9V DC center negative and draws 65 mA according to RockBoard's PedalPedia.
What is the difference between the BOSS DD-2 and the DD-3?
The DD-2 and DD-3 share the same core circuit: Guitar World reports the DD-2 contained the same 63H101 CMOS gate array IC, the so-called long chip, as the Roland SDE-3000, and the DD-3 carried that design forward. Guitar World also observes that almost everyone who is anyone has used a DD-2 or DD-3 at some point in their careers.
Does the DD-2 have stereo outputs?
Yes. BOSS lists stereo outputs among the DD-2's features, alongside a versatile Hold function and a narrower vintage digital frequency response of 40Hz to 7kHz.
What does Hold mode do on the DD-2?
When Hold mode is selected, the pedal infinitely repeats a short section for as long as the footswitch is held down. Guitar World describes this as providing a primitive looper function, letting a player lay down a short phrase and play over it while the switch is pressed.
Sources (10)
- BOSS - PX-1 | Plugout FX, BOSS (boss.info)
- BOSS Unveils DD-500 Digital Delay, Guitar Interactive Magazine, 2015-07-09
- Boss DD-500 Digital Delay review, MusicRadar, 2015-12-08
- Echoes in Time: The History of BOSS Delay Pedals, BOSS (articles.boss.info), 2024-01-10
- BOSS - PX-1 | Plugout FX, BOSS (www.boss.info)
- DD-2 Digital Delay by BOSS, RockBoard PedalPedia, 2026
- The Boss digital delay pedal that changed the world, Guitar World, 2026-06-01
- The PX-1 Plugout FX: Timeless BOSS Pedals Reborn, BOSS (articles.boss.info), 2025-06-06
- Guitar Pedal X, Guitar Pedal X, 2025-08-28
- OG-or-wannabe-2290, vertexeffects.com, 2021-05-04
