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x42-plugins review

#29 of 40 in Audio Plugins

A broad LV2 suite with Linux support, priced from $49 for a one-time license.

5.7/10Editor score
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

x42-plugins is an open-source suite of audio-processing plugins and standalone JACK applications for musicians, audio engineers, and Linux audio users. Its scope ranges from parametric equalization and metering to limiting, pitch correction, compression, convolution, routing, and signal generation. Builds are offered for Windows, macOS, Linux, and Linux ARM systems, making the suite relevant beyond Linux even though its positioning is especially suited to Linux users seeking LV2 tools and utilities.

The breadth is a key distinction: alongside EQ with shelf and high/low-pass filters, the suite includes audio-level, loudness, spectrum, phase, and goniometer meters, plus digital-peak and true-peak limiting. Vocal pitch correction supports MIDI-controlled note targeting, and speaker rotation uses physical modeling. Utility plugins add a tuner, oscilloscope, routing, delay, and signal generation. Standalone JACK applications extend the offering beyond plugins. This makes x42 a fit for users who want varied processing and utility functions within an LV2-focused collection, rather than a narrow specialist plugin.

The listed starting price is $49 USD for a one-time license, and there is no free plan. Source code and distribution packages are available, while tested binary releases for some plugins require licenses. LV2 is the only listed plugin format, so buyers who require a different plugin format should look elsewhere. Integrations include Ardour, Harrison Mixbus, REAPER, Audacity, and Carla. Choose x42-plugins if its LV2 format and range of audio tools suit your workflow; consider an alternative if another plugin format is essential or a free plan is a requirement.

x42-plugins pros and cons

  • Where it wins
    • Covers EQ, metering, limiting, pitch correction, routing, and signal generation
    • Standalone JACK applications complement its LV2 plugins
    • Integrates with Ardour, REAPER, Audacity, Carla, and Harrison Mixbus
  • Where it doesn't
    • LV2 is the only listed plugin format
    • The starting price is a one-time $49 license
    • Some tested binary releases require licenses

x42-plugins fact sheet, pricing and score →

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