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MIDI Aid

Tobias Wissmueller

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Get it free on the App StoreOpens Apple's App Store

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About this app

MIDI Aid is a MIDI monitor: connect your MIDI devices and see every incoming event in one clean, technical view. Whether you are debugging a synth patch, checking a controller mapping, or just curious what your gear is sending, MIDI Aid shows you what is really happening on the wire. CAPTURE • Live event log with precise timestamps • Start, pause, and resume capturing at any time • Clear the log with one tap • Follow mode keeps the newest events in view • Clear controls in the style of studio gear: a capture key, a status display with the live event count, and a Follow key with a light that shows when it is on UNDERSTAND • Every event decoded into plain language: notes with names and velocities, controllers with their standard names, program changes, aftertouch, pitch wheel, and more • Raw status and data bytes side by side with the decoded event • Hex or decimal display, your choice • Tap any event for a detail view including the full raw bytes FILTER • Focus on what matters: filter by device, event type, and MIDI channel • Channel events, system common events, and system real time events can be toggled individually • Mute noisy events like Timing Clock or Active Sensing with one tap • All 16 MIDI channels as pads: tap one to hide or show it • Each section shows how many of its filters are on DEVICES • Works with USB MIDI devices out of the box • Network MIDI sessions and Bluetooth MIDI devices set up at system level appear automatically SUBSCRIPTION • MIDI Aid Pro: try it free for one week, then 0.99 € per month (or the equivalent in your currency) • Cancel any time in your account settings • Bought MIDI Aid before it became a subscription? It stays unlocked for you: tap Restore purchase • Terms of Use: https://ramuslabs.com/midi-aid/terms/ MIDI Aid supports all 16 MIDI channels, running status, and System Exclusive messages. No account, no ads, no tracking. Your MIDI data never leaves your device. MIDI Aid only counts anonymously which features are used; a random install ID is added only if you allow it.

What's new

Version 2.1.1 · Nov 11, 2026

Now and then, when you open MIDI Aid, it asks for a rating. Never in the first week, and at most every four months. A rating helps others find the app.

In-app purchases

The most popular purchases on the App Store.

  • MIDI Aid ProSubscription · 7 days free trial$19.00 / month

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