Dexed

At a glance

• Editor score
  7.2 / 10
• Pricing
  Free plan
• Best for
  Free DX7-style FM synthesis
• Free plan
  Yes
• Paid from
  Free
• Standalone app
  Yes
• Facts checked
  19 Sep 2026

• Where it wins

  • Six-operator FM engine with three selectable engine types
  • Loads, saves, and manages DX7/TX7 SysEx patches
  • Runs standalone or as a plug-in, with MPE and microtuning support

• Where it doesn't

  • Its focus is narrower than broader virtual instruments
  • The FM workflow may not suit buyers seeking other synthesis approaches
  • No paid tier is offered for buyers seeking a commercial support plan

Our verdict on Dexed

Dexed is a free, open-source FM synthesizer modeled on the Yamaha DX7, aimed at musicians who want to create or manage DX7-style sounds. It runs on Windows, macOS, and Linux, and can be used either as a standalone application or within a DAW. Its six-operator design and 144 DAW-automatable DX7 parameters make it a focused instrument rather than an all-purpose virtual instrument.

Patch exchange is a central part of Dexed’s appeal. It supports DX7/TX7 SysEx input and output, loading and saving, and includes a MIDI cartridge manager with drag-and-drop program handling. That makes it relevant both to software-based sound design and to owners of compatible Yamaha DX7 or TX7 hardware who want a librarian and patch-management tool. Three engine types—Modern, Mark I, and OPL Series—offer distinct options within the FM focus; realtime VU meters for each operator help expose activity while shaping sounds.

The published offering is free and open source under GPL v3, with no paid tier to compare. Plug-in formats include VST3, AU, CLAP, and LV2, alongside standalone use. Microtuning and MPE support extend performance options, though the instrument remains specifically centered on FM synthesis rather than a broad range of synthesis methods. Choose Dexed if you want a no-cost DX7-style instrument, SysEx patch handling, or compatibility with a desktop DAW across the listed systems. Look elsewhere if you need a broader instrument palette or a product organized around a commercial paid plan.

Your product? Our editors can test Dexed in depth and publish a review, labelled as paid · from $149/mo →

Dexed pricing

Dexed fact sheet

Dexed integrations

Dexed lists 2 integrations on its own site.

• Yamaha DX7
• Yamaha TX7

Alternatives to Dexed

• KKontakt 8Kontakt 8 pairs a large sampled-instrument library with synthesis and DAW plug-in support.9.4
• Arturia V Collection 11A broad virtual instrument bundle with a smaller $199 entry edition and a 45-instrument Pro tier.9.2
• OOmnisphereA broad sound-design instrument for producers and performers willing to pay $499 once.8.9

See all Dexed alternatives →

Featured on iTechGuides

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

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Last updated 7 Oct 2026 · How we research and update