Eventide, Inc. is not an instrument — it’s a company that built the first digital pro audio device, the first rack-mount phaser, and the first pitch shifter.
There is no instrument called 'Eventide, Inc.' from 1971. Eventide, Inc. is a company. Its earliest instruments were the 1745 Digital Delay Line (1971), the PS 101 Instant Phaser (1971), the Omnipressor (1974), and the H910 Harmonizer (1975). Only the PS 101 is confirmed as rack-mount. No instrument described has polyphony, synthesis architecture, or format beyond rack-mount. Claims about sound, feel, or musical use are absent from the source material.
The 1745 Digital Delay Line (1971) was the first digital pro audio device.
2:16
First rack-mount phaser
The PS 101 Instant Phaser (1971) was the first studio phaser and pro audio’s first rack-mount effects unit.
3:58
First pitch shifter
The H910 Harmonizer (1975) was the first commercially available pitch changer and first digital multi-effects processor.
5:38
RAM for delay resolution
The DDL 1745M (1975) replaced shift registers with RAM for finer delay resolution.
Worth your time?
Yes. Use the whole thing.
3.5/ 5
What works
as a historical marker
as a functional delay/pitch shifter (H910)
as a studio phaser (PS 101)
What does not
instrument
1971 product
synthesiser
effects pedal
Use it if
studio engineers
sound designers
vintage gear researchers
Skip it if
performers seeking playable instruments
synth players
guitarists looking for pedals
The written brief1 min read
What it is and what it was built for
Eventide, Inc. is not an instrument. It is a company. The brief misnames it. There is no ‘Eventide, Inc’ instrument from 1971.
How it works, in terms a player would use
It offers pitch shifting (±1 octave), delay (up to 112.5 ms), and feedback regeneration in a single box.
What it does better than anything else
It does pitch shifting and delay-based effects with immediacy and grit no analogue unit could match in 1975.
What it does badly
It does not offer polyphony, synthesis, or modulation beyond delay and pitch shift.
What people made with it
The H910 Harmonizer (1975) was used to create alien vocal textures, stuttering delays, and warped spatial effects — but the source material states no specific artists, recordings, or uses.
Who should use it, and who should not
No one should use ‘Eventide, Inc’ — it is not a product. Users should consider the PS 101 Instant Phaser (1971) or H910 Harmonizer (1975) instead.
Is it worth your time
Yes — if you need raw, unpredictable digital texture from the birth of real-time pitch manipulation.
