Dexed Free DX7 FM 2026: Open-Source, Not FM8

This Page Is Dexed. It Is Not FM8. It Is Not a Surge XT Review.

Stay here for Dexed as a 2026 free DX7-style FM instrument: GPL v3, v1.0.1, engines, sysex/cartridge librarian, formats, and where to download. Do not use this file as a Native Instruments FM8 review, a Surge XT walkthrough, a Vital tutorial, a free-synth roundup, or a Superstar Saw feature.

asb2m10.github.io/dexed is the user-site primary. github.com/asb2m10/dexed is the source, changelog, and licence primary. The v1.0.1 GitHub release is the dated stable build. KVR’s Dexed card is the independent free/format card. Wiki: use the Yamaha DX7 operating manual as reference documentation because Dexed is modeled on that machine.^[1][2][5]

FM synthesis school, Surge XT, Vital, free-synth lists, and NI Superstar Saw live on related slugs. README goal: stay a DX7 companion; TX81z-style extra waveforms would be a fork, not this project.^[2]

Free (0). GPL v3. Stable v1.0.1 Dated 29 November 2025.

User site: Dexed is free software licensed on the GPL v3. KVR: Free; copy protection none; open source GPL. That is 0, not a “freemium” cap, not a 10-request demo. README: donations welcomed (PayPal) for a 10-year-old project and macOS notarization—optional, not a paywall.^[1][4][2]

GitHub release v1.0.1: 29 November 2025. Notes: fixes scaling issues from 0.9.9; 1.0.x so the DAW-reported version follows Dexed releases; remove default scaling detection; CLAP scaling; dialogs attached to the plugin window; Linux binary rebuilt for older glibc. README 1.0.1 bullets match: DAW scales the UI then you can zoom; CLAP scaling fix; parameter dialogs in the main window.^[3][2]

Nightly pre-release builds exist on GitHub. This page cites v1.0.1 as the current tagged stable on the user site. Do not treat Nightly as the version you put on a release session unless you chose that risk.^[2]

Three Engines, 144 Parameters, DX7 Sysex Librarian

User site features: 144 DAW-automatable DX7 parameters on one panel; full DX7 input/output sysex including controller change (patch editor / sysex manager with a hardware DX7/TX7); per-operator realtime VU; load/save DX7/TX7 sysex programs, including saving a single program to another sysex file. Engine: music-synthesizer-for-android (msfa), modeled on original DX7 characteristics.^[1]

Cartridge manager: any .syx in the Cartridges directory shows in the CART window (CART → SHOW DIR). Drag-and-drop programs; double-click loads the selected program; context menu can send to a DX7. User site points at BlackWinny’s Dexed_cart_1.0.zip compilation as a community cartridge pack to unzip into that folder—optional, not bundled as a second product.^[1]

• Modern User site: original 24-bit music-synthesizer-for-android implementation.^[1]
• Mark I User site: based on the OPL series but higher resolution (10-bit LUTs); target is closest to a real DX7. README: default engine since 0.9.2.^[1][2]
• OPL Series User site: experimental reverse-engineered OPL-family chips, 8-bit; envelopes still need tuning. Compare engines; do not treat OPL as the DX7 authenticity target.^[1]
• Beyond DX7 (explicit non-goals) README: extra waveforms à la TX81z should be a fork. Changelog TODO: Yamaha 4-op (DX21/DX27/DX100) sysex import is still listed as future work—not a 1.0.1 feature.^[2]

Where to Get 1.0.1. What Formats the Pages Disagree On.

Download the tagged 1.0.1 assets from GitHub Releases (KVR mirrors those links). Wiki install: Windows installer; macOS notarized package; Linux unzip then copy Dexed.vst3 to ~/.vst3, Dexed.clap to ~/.clap, or run the standalone. Click the Dexed logo for the about box / version.^[3][6][4]

Do not invent an AAX build: none of the cited pages list AAX. User-site “VST, AU, LV2” is stale next to KVR’s VST3/CLAP/standalone. Guix’s dexed 1.0.1 package notes outputs clap, lv2, vst3—another independent format list, still not AAX.^[7]

Other README features worth the FM page: MTS-ESP and SCL/KBM microtuning; MPE (since 0.9.5); accessibility/keyboard shortcuts (0.9.8); Apple Silicon (0.9.6). Those are changelog facts, not an FM8 comparison chart.^[2]

When Free Dexed Is the Move. When to Use Something Else.

Use Dexed if you want DX7 six-operator FM, factory-style .syx banks, or a librarian next to a hardware DX7/TX7, at 0. Skip it if you needed FM8-style extra operators/waveforms, a wavetable synth (Vital), or Surge XT’s hybrid engines—those are related slugs. Skip TX81z “Lately Bass” conversions: that machine is 4-op with extra waveforms; README says that is out of scope for this repo.^[2]

Wiki: Dexed is modeled on the DX7, not promised as a perfect clone. Compare Mark I vs Modern on the same cartridge before you decide the engine. Load community .syx only from sources you trust.

FL, Ableton, Logic: One Pass on v1.0.1

This checklist is a first Dexed insert, not an FM-synthesis course. Related FM beginners’ guide covers operator math.

1. Install tagged v1.0.1 from GitHub
   Use the 29 November 2025 release assets, not a random mirror. Windows/macOS installers; Linux VST3/CLAP/standalone per the wiki. Click the logo to confirm 1.0.1.^[3][6]
2. Load a DX7 .syx cartridge
   CART → SHOW DIR, drop .syx, double-click a program. Optional: BlackWinny Dexed_cart pack linked from the user site. Keep Mark I as the default authenticity pass, then A/B Modern.^[1]
3. Treat it as a DX7, not FM8
   Six operators, DX7 algorithms, sysex. Do not expect TX81z extra waveforms. If you need that, you need a different synth—or a fork, which this README refuses to become.^[2]
4. Stop before this page becomes Surge or a free-synth list
   Once a bass or bell prints, bounce. FM beginners, Surge XT, Vital, free-synth 2026, and Superstar Saw are related slugs.

FM8, Surge XT, and Free-Synth Roundups Are Out of Scope

This article does not review FM8, Surge XT, or Vital. It does not rank every free synth. Dexed is the GPL DX7 companion: v1.0.1, 0, sysex librarian, three engines.

As of this September 2026 fetch, the user site and GitHub still present 1.0.1 as current stable. Recheck GitHub Releases if a later 1.x tag landed after this page.^[1][3]