Eventide Model H949 Harmonizer

Eventide Model H949
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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.

The Eventide Model H949 is built to professional industry standards, using random access memories (ROM) for high quality, dependable performance.

Like all pitch changers using time speed-up/slow-down techniques, the Harmonizer produces certain artefacts or ‘giitches’ in the output during pitch change operation. The relative audibility and severity of these artifacts depend upon many factors, including the pitch ratio and the nature of the program material.

The Eventide Model H949 Harmonizer has been designed with two different algorithms, allowing the user to choose which sounds best for the particular application.

Because judgement of the performance of the Eventide Model H949 Harmonizer is, in the final analysis, very subjective, we suggest that you try the Harmonizer before buying one. This warning does not apply to the Delay mode, in which the unit works Just fine.

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Eventide Model H949 Harmonizer Reviews

Have you owned this product? Let others know what you thought of it.


(3 Reviews)

Build Quality 87%
Sound Quality 90%
Usefullness 87%
Mojo/Funk 97%
Reliability 73%

What other owners say...

The best early harmonizer

By Marcus

Build Quality 60%
Sound Quality 70%
Usefullness 80%
Mojo/Funk 90%
Reliability 30%
I like this one. It’s more flexible and has better audio quality than the H910 but still has the charm.


By Michael Behringer

Build Quality 100%
Sound Quality 100%
Usefullness 100%
Mojo/Funk 100%
Reliability 100%


By David Holiday

Build Quality 100%
Sound Quality 100%
Usefullness 80%
Mojo/Funk 100%
Reliability 90%

Used it? Leave your rating and review

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Released: 1977
Quantization: Unknown
Sampling Frequency: Unknown
Frequency Response: 20Hz-15kHz
Dynamic Range: 96dB
THD: Below 0.15%

Plug-In Options
Eventide H949 Harmonizer
Building on the legacy of the H910 pitch shifter, the H949 was Eventide’s first de-glitched pitch-shifter. Produced from 1977 – 1984, it introduced MicroPitch which used a proprietary single sideband modulation technique for precise control of small pitch shifts. The H949 also offered unique flange, reverse and randomized pitch effects.
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