Harrison De-Esser plug-in: features and spec-based rating

Harrison’s De-Esser is a de-esser that uses Harrison’s fourth-generation de-essing algorithm. You can operate the “S” band and a high-frequency shelf together on a graph on the screen, and it runs with zero latency.

A de-esser reduces only the harsh sounds that stand out on “S” and similar sounds in singing (sibilance).

In this article we compare Harrison De-Esser with 12 de-esser plug-ins and rate how well it serves its purpose on three criteria. The basis is official manufacturer information.

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Summary

Among the 12 de-esser plug-ins, Harrison De-Esser is rank A. The ranks run S, A, B and C, and A is second from the top. Averaging the scores for each criterion (out of 5, with the one criterion that matters most for the purpose counted double) gives 3.5.

Strengths

• Natural reduction (4 points): it reduces only the harsh sounds naturally, without changing the voice quality.
• Breadth of uses (4 points): it does more than reduce sibilance, so its uses are wide.

Things to keep in mind

• Speed (2 points): you have to set the details yourself.

Who it suits: people who want to decide quickly while watching the sibilance band on a graph.

Main features of Harrison De-Esser

The sibilance band and a high-frequency shelf

With Ess Freq and Ess Depth you set the lower edge of the sibilance band (200 Hz to 8 kHz) and how deeply it is reduced (0 to -12 dB), and with Hi Freq and Hi Depth you set a high-frequency shelf (2 kHz to 12 kHz, up to -12 dB). Ess Center and Ess Width move the position and width of the band together.

Operate on the graph, and check with Band Solo and Auto Solo

Just by dragging on the graph on the screen you can make six adjustments. With Band Solo and Auto Solo you can listen to only the band being reduced while you adjust, to find the pitch and width of the sibilance.

Zero latency and the algorithm

It uses a fourth-generation algorithm that avoids fricatives other than sibilance. Because there is no delay, it is said to be usable live. The content of this article was confirmed on the product page of the retailer, Plugin Boutique.

Where it is useful

• Quickly deciding the band of the “S” sounds in a vocal while watching the graph
• Using Band Solo to listen to only the band that hurts the ears and find it
• Using the zero latency to monitor while recording

Rating by criterion

Natural reduction: 4 / 5

We check whether it has a mechanism that reduces only the harsh “S” sounds that hurt the ears, without changing the voice quality.

You can adjust the sibilance band (Ess) and the high-frequency shelf (Hi). It is described as an algorithm that avoids fricatives other than sibilance and acts only on harsh sibilance.

Speed: 2 / 5

We check whether it has features that get you to a good setting quickly (automatic settings, a single knob and so on).

The controls are standard. Most settings can be made on the graph. There is no function that sets things automatically.

If “speed” matters most to you, smart:deess and Vocal De-Esser (5 points) are a better fit.

Breadth of uses: 4 / 5

We check whether it also handles problems other than sibilance (plosives, harsh ringing) and can be used while recording.

Zero-latency processing with no delay means it can be used live. Band Solo and Auto Solo let you listen to only the band being reduced and decide.

How we score (De-esser plug-ins)

Criterion	Basis	5 pt	4 pt	3 pt	2 pt	1 pt
Natural reduction	A mechanism that reduces only the sibilance (harsh "S" sounds) without changing the voice quality	AI identifies each consonant one by one and shapes it by spectrum, not only by volume	A mechanism that acts only on the problem band (split band, dynamic EQ, resonance suppression, AI learning and so on)	A general method that sets a band and lowers the overall volume	—	—
Speed	How quickly you can reach a good setting	AI sets everything automatically just by loading it	It follows changes in the voice's level automatically, or almost everything takes a few operations	A vocal mode makes it easy to set	Standard controls	—
Breadth of uses	Plosives, harsh resonances, stereo and use while recording	Works on harsh resonances in general, and supports M/S processing and operation with no delay	Two or more of M/S, sidechain listening, low latency and use on other material	One use besides sibilance, such as plosives	Sibilance only	—

Each criterion is scored from 1 to 5 on how well the product serves one goal: naturally reducing the sibilance of a vocal. Scores follow the conditions in the table above, and the rank is based on an average in which "Natural reduction" counts double. The basis is official manufacturer information. Sound quality and CPU load are not measured, so they are not scored; reviews from trade magazines are introduced in the articles for reference. Price is not part of the score. Features that cannot be confirmed from the manufacturer's or a retailer's description are scored as if absent. The "OBS (streaming)" column in the table shows whether the official page lists the VST2 format that the streaming software OBS Studio can use (○). OBS does not support the VST3 format. It is not part of the score.

Harrison De-Esser system requirements and getting started

Operating system	Windows 7 or later / Mac (macOS 10.9 or later)
Plug-in formats	VST, VST3, AU, AAX (you choose when installing, to suit your DAW)
Other	Check the retailer’s (Plugin Boutique) product page
OBS (streaming)	Works as it is (VST2 is listed)

Checked on the manufacturer’s official pages on October 17, 2026.

Compared with other de-esser plug-ins

Click a heading to sort. On a phone, the table scrolls sideways.

Read next

• Pro-DS: features and rating (rank A)
• pure:deess: features and rating (rank A)
• smart:deess: features and rating (rank S)
• Soothe3: features and rating (rank S)