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Digital effects processors showcase the best of digital signal processing, offering multiple effects like reverb, delay, and modulation in one unit. Eventide pioneered this field with the H910 Harmonizer, the first commercially available digital effects processor, combining pitch effects, delay, and feedback. This innovation cemented Eventide’s dominance, culminating in the cutting-edge H9000. Yamaha also made waves with the SPX90 in 1985, a one-rack-space processor featuring reverb, delay, chorusing, and more, leading to a successful SPX series. Other notable players like Alesis, Ensoniq, Korg, Kurzweil, Lexicon, Roland, Sony, and TC Electronic have contributed standout products, including the Ensoniq DP/4, DP/4+, and Sony DPS-V77.

Released in 1974

Eventide Model H910 Harmonizer®

The Eventide Model H910 Harmonizer was developed by Eventide in 1974. It was the world’s very first digital effects processor. It combined ‘de-glitched’ pitch change with delay and feedback. It could be controlled by a keyboard remote control to instantly shift pitch in half steps.
Eventide Model H910
Released in 1976

MXR Model 129 Pitch Transposer

The MXR Model 129 Pitch Transposer is a classic piece of audio equipment that was released in the late 1970s. The unit was designed to allow musicians and audio engineers to transpose the pitch of audio signals up or down by a fixed amount, ranging from one octave below to one octave above the original pitch.
MXR Model 129 Pitch Transposer
Released in 1977

Eventide Model H949 Harmonizer®

The Eventide Model H949 Harmonizer is a combination digital delay line, pitch changer, and all-round special effects unit. The TIME REVERSAL feature is entirely new. When used with a variable-speed tape recorder, the Harmonizer is capable of shortening or lengthening a piece of program material to fit a given time slot, without altering the pitch.
Eventide Model H949
Released in 1978

Roland DC-50 Digital Chorus

The Roland DC-50 Digital Chorus, released in 1978, is a desktop chorus and hall echo unit combining warm analogue BBD chorus with early digital echo. Designed for vocals and instruments, it offers simple controls, flexible inputs, and a rich, spacious sound that remains sought after for its classic late-70s Roland character.
Roland DC-50
Released in 1980

Publison DHM B2 Stereo Digital Audio Computer

The Publison DHM B2 out of France is a stereo audio computer, which allows dual digital delays and dual pitch shifting effects, it preceded the Publison Infernal Machine.
Publison DHM B2
Released in 1984

Publison Infernal Machine 90 Stereo Audio Computer

France’s contribution to recording studio effects, the Publison Infernal Machine 90, Stereo Audio Computer. The Publison Infernal Machine 90 is a computer-based audio processor released around 1984, from a company based in France.
Publison Infernal Machine 90
Released in 1985

Yamaha SPX90 Multi-Effects Processor

The Yamaha SPX90 was released in 1985 as an affordable multi-effects processor for the masses. It remains today a true classic digital effects processor. It is also the most looked at effects processor on this website.
Yamaha SPX90
Released in 1985

Lexicon PCM 70 Digital Effects Processor

The Lexicon PCM 70 has become something of a legend of late, with good examples selling for the same money or more, than what they sold for when new. It is ironic really…when the Lexicon PCM 70 was released everyone said it was not a ‘real’ Lexicon. While it may not be a 224X, released the same year, it does offer a taste of the Lexicon sound.
Lexicon PCM 70
Released in 1985

Eventide Model H969 Harmonizer®

Eventide’s newest Harmonizer in 1985 was the Eventide Model H969, which expanded on Eventide’s already capable Eventide Model H949 Harmonizer. The Eventide Model H969’s new ProPitch digital electronic-splicing algorithm gives you the cleanest, most glitch-free pitch change ever. Deglitching is active over a wider bandwidth, too – a full octave wider.
Eventide Model H969
Released in 1986

Yamaha SPX90II Multi-Effects Processor

The Yamaha SPX 90 II was essentially the original SPX 90 with more memory added to improve delay times, and they gave it a new look with green button surrounds. Regardless of the fact that the SPX 90 II is the exact same effect processor as the SPX 90 only with increased memory for longer delay times, it sells for much less. Bargain hunters rejoice!
Yamaha SPX90II
Released in 1986

Roland DEP-5 Digital Effects Processor

Roland proudly introduced a new standard in signal processors the Roland DEP-5 Digital Effects Processor. The Roland DEP-5 incorporates Roland’s most advanced digital technology for great sound and easy programming. Roland digital effects devices are the choice of musicians and engineers the world over. Onstage and in studios, the remarkable SRV series digital reverb units and SDE series digital delays play a vital role in today’s music.
Roland DEP-5
Released in 1987

Boss RCE-10 Chorus Ensemble

The Boss RCE-10 Digital Chorus Ensemble, was a cutting-edge pedal that takes your musical experience to new heights.
Boss RCE-10
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