Midside

Name: Midside
Price: 95 USD
Author: Goodhertz

by Goodhertz · Imaging · Mid/side processor and stereo widener

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Midside is a mid/side processor for stereo imaging and M/S microphone recording, with gain faders, tilt EQs and several width modes.

It includes a Mono Below section for tightening bass, and costs $95.

Best for: Mix Bus, Mastering, Acoustic Instruments, Keys & Synths. Genres: all genres.

Keywords: mid/side, wide, bass, bus processing, full mix, mastering, metering, minimal controls, mix bus, mixing, repair, tight.

What it does

Midside offers "expressive stereo imaging." It turns M/S work that usually needs several tracks and buses into one stereo insert, and the developer says it does with a handful of controls what other M/S plugins need over 50 for.

Mid and side channels: high-resolution gain faders with built-in meters, plus on/off, solo and mute for each.
Tilt EQs: a tilt EQ on mid and on side, taken from Goodhertz's Tiltshift, with adjustable frequency range and loudness modes (Auto, Standard, Treble, Bass); the two can be linked.
Width modes: a 0 to 200% width control with six modes: Standard, Natural (psychoacoustic), Shuffler A, B and C, and M/S Blend.
Mono Below: mono the low end below a sweepable frequency, with strength, Bass Makeup to restore bass in the mid, and Listen to hear the side content being removed.
Panning: separate mid and side pan controls, which can be linked.
Routing: input and output each set to L/R or M/S, so it can encode, decode or process M/S mic recordings, plus a left/right flip.

Goodhertz's downloads page lists version 3.14.1 (June 2026) for its plugin line (the online manual covers 3.13). It is stereo in and stereo out, and all controls, including mute and solo, automate without clicks. A 30-day free trial is available.

Source: Goodhertz product page

When to use it

Midside is a fuller M/S toolbox than a single width knob, which suits mastering, bus work and M/S mic recordings. Compared with Ozone Imager and S1 Stereo Imager, it lacks multiband width but adds tilt EQs on mid and side, mid and side panning and solo/mute for each channel. Unlike bx_stereomaker, which is built to create width on mono or narrow sources, it reshapes a stereo signal that already exists. Its Mono Below section covers the bass-mono job some engineers would otherwise give to a separate plugin.

Best for: stereo width on buses and masters, mono-ing bass, rebalancing mid against side, and decoding M/S mic recordings.
Genres: any.
Look elsewhere if: you need multiband width (Ozone Imager), want to widen a mono source (bx_stereomaker), or only need encode/decode (Goodhertz's free Midside Matrix).

Where to buy

Goodhertz: $95

Tutorials and reviews

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