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SPECIFICTION
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x42-plugins

x42-plugins.com

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Spec score 7.2 #28 of 40 in Audio Plugins

What it is

x42-plugins is a collection of audio-processing tools offered as LV2 plugins and standalone JACK applications for Linux, macOS, and Windows. Its audio, MIDI, and utility tools include equalizers, meters, synthesizers, tuners, and sequencers. The Meter Collection has needle and bar-graph meters, an EBU R128 meter, phase displays, and spectrum analysis. The Equalizer is a four-band parametric EQ with shelf and high- and low-pass filters, zero latency, and spectrum and spectrogram displays. LV2 plugins need an LV2-capable host; standalone applications require JACK. The FAQ lists Ardour, Harrison Mixbus, REAPER, Audacity, and Carla among LV2-compatible software. x42-meters, x42-eq, and x42-whirl are included with Harrison Mixbus and Mixbus32C. Source code is available under GNU GPL version 2 or later. Without a valid license signature, plugins process audio, but their GUI stops responding to mouse input and eventually fades to black. Listed one-time license prices are 19.00 USD for Whirl Speaker, 29.00 USD for Equalizer, and 49.00 USD for Meter Collection.

Spec sheet

Product
x42-plugins are professional audio processing units available as LV2 plugins and JACK applications.Read 3 Oct 2026 · x42-plugins.com
Platforms
The site offers downloads for Windows, macOS, and GNU/Linux, including ARM builds.Read 3 Oct 2026 · x42-plugins.com
Support
Support inquiries can be sent by email, and the Harrison Mixbus forum serves as a user forum for x42-plugins.Read 3 Oct 2026 · x42-plugins.com
Audio and MIDI tools
The collection includes audio, MIDI, and utility plugins such as equalizers, meters, synthesizers, tuners, and sequencers.Read 3 Oct 2026 · x42-plugins.com
Compatibility caveat
The maker advises testing compatibility with the operating system and host applications before purchasing an activation code.Read 3 Oct 2026 · x42-plugins.com
Demo restriction
Without a valid license signature, plugins process audio normally, but their GUI does not respond to mouse interaction and eventually fades to black.Read 3 Oct 2026 · x42-plugins.com
Equalizer features
The Equalizer is a four-band parametric EQ with shelf and high- and low-pass filters, zero latency, and built-in spectrum and spectrogram displays.Read 3 Oct 2026 · x42-plugins.com
Host integrations
The FAQ names Ardour, Harrison Mixbus, REAPER, Audacity, and Carla among software that supports LV2.Read 3 Oct 2026 · x42-plugins.com
License scope
A purchased license is personal, cannot be shared with other individuals, and can be used across operating systems and the owner's machines.Read 3 Oct 2026 · x42-plugins.com
Meter features
Meter Collection includes standards-based needle and bar-graph meters, an EBU R128 meter, phase displays, and spectrum analysis.Read 3 Oct 2026 · x42-plugins.com
Mixbus inclusion
x42-meters, x42-eq, and x42-whirl are included with Harrison Mixbus and Mixbus32C.Read 3 Oct 2026 · x42-plugins.com
Open source license
The plugins are licensed under the GNU General Public License version 2 or, at the user's option, any later version; source code is available.Read 3 Oct 2026 · x42-plugins.com
Security note
The FAQ states that the Windows installer is not digitally signed.Read 3 Oct 2026 · x42-plugins.com
Supported formats
The software comes as a standalone application and as a plugin; LV2 plugins need an LV2-capable host, and standalone applications require JACK.Read 3 Oct 2026 · x42-plugins.com

Plans and prices

Whirl Speaker license $19, paid once Buy License shown as $49 $19 Personal license · valid across operating systems and the owner's machines Read 3 Oct 2026 · x42-plugins.com
Equalizer license $29, paid once Buy License shown as $69 $29 Personal license · valid across operating systems and the owner's machines Read 3 Oct 2026 · x42-plugins.com
Meter Collection license $49, paid once Buy License shown as $99 $49 Personal license · valid across operating systems and the owner's machines Read 3 Oct 2026 · x42-plugins.com

Every x42-plugins plan and price →

Strong points and limits

Strong points

  • Includes audio, MIDI, and utility plugins.
  • Equalizer includes spectrum and spectrogram displays.
  • Source code is available under GPL version 2 or later.
  • Licenses work across the owner's operating systems and machines.

Limits

  • LV2 plugins need an LV2-capable host.
  • Standalone applications require JACK.
  • Unlicensed plugin GUIs stop responding to mouse input.
  • Windows installer is not digitally signed.

Who it suits

x42-plugins suits audio users with an LV2-capable host or a JACK setup who need audio, MIDI, or utility tools. Buyers should check compatibility with their operating system and host before purchasing an activation code.

Verdict

x42-plugins offers distinct meters, equalizer, and other audio tools, with formats and host requirements stated. Listed license prices are one-time; the GUI restriction without a valid signature is worth noting.

Where Specifiction places it

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