REXS — EXS24 to SF2
Your EXS24 library, anywhere
$2.99
Also Included In
Is your EXS24 library locked inside Logic?
Years of collected instruments — factory banks, purchased libraries, your own patches — and all of it only opens on a Mac with Logic installed. On your iPad, on stage, at a friend's studio: unreachable.
REXS sets that library free.
HOW IT WORKS
• CONVERT IN ONE DRAG
Drag an .exs file (or a whole folder) into the app. REXS reads the instrument, finds its audio files and writes a faithful SoundFont (.sf2) — zones, key ranges, velocity splits, loops, envelopes, tuning. Your original file is never touched.
• IT FINDS THE SAMPLES BY ITSELF
EXS24 instruments reference external audio that drifts around over the years. REXS searches the instrument's folder, its neighbors and the whole tree — and if something is still missing, it asks you to point at the folder and resolves the rest. WAV, AIFF and CAF (including ALAC).
• BUILD THEMED BANKS
Combine instruments from any number of sources into a single .sf2: check, drag to reorder, rename, generate. "My favorite pads" in one file, ready for any sampler.
• EDIT THE SOUND AND HEAR IT INSTANTLY
Adjust each preset's volume, pan, tuning, attack, release and filter with the built-in player: play the on-screen keyboard or connect your MIDI controller. Stack presets as layers and balance the mix.
• AUv3 PLUG-IN IN YOUR DAW
Converted instruments show up directly in AUM, GarageBand, Logic, Cubasis and any AUv3 host — nothing to export.
WHY REXS IS DIFFERENT
• 100% ON YOUR DEVICE
No cloud upload. No account. No cookies. No trackers. Your libraries (many of which you PAID for) never leave your iPhone, iPad or Mac.
• YOUR ORIGINALS ARE SACRED
REXS never modifies or deletes your files. Conversion creates new files; your .exs and audio stay exactly where they were.
• ONE-TIME PURCHASE, NO SURPRISES
No subscription, no in-app purchase, no "pro" tier. What you buy is the entire app.
• UNIVERSAL
A single app for iPhone, iPad AND Mac. Buy on any device, install on the others for free.
WHO IT'S FOR
• Live keyboard players using an iPad on stage
• Producers who switched machines and "lost" their library
• Anyone who moved away from Logic and wants their sounds back
• Sound designers recombining banks
• Beatmakers digging through vintage instruments
ABOUT THE FORMATS
EXS24 is the format of Logic's sampler (now "Sampler"), used by thousands of commercial and free libraries since 1999. SoundFont 2 (.sf2) is an open standard from 1995, alive in hardware samplers, plug-ins and mobile apps. REXS reads the former and writes the latter respecting 100% of the spec.
GET STARTED
Drag an .exs in (or tap "Add EXS24 files" and point at a folder). Check the presets, name it, generate. That's it.
Your instruments, anywhere.
—
EXS24, Logic and GarageBand are trademarks of Apple Inc. REXS is an independent product compatible with files in the EXS24 format, and is not affiliated with or endorsed by Apple.
Ratings & Reviews
Samples not found: the alert now shows WHICH audio files the instrument is looking for, not just the instrument's name.
The developer, Rubens Felicio, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Rubens Felicio
- Size
- 2.4 MB
- Category
- Music
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
English and 7 more
- English, French, German, Italian, Japanese, Portuguese, Simplified Chinese, Spanish
- Age Rating
4+
- 4+
- Copyright
- © 2026 Rubens Felicio
