MIDI Aid

Tobias Wissmueller

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

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

DEVICES
• Works with class-compliant USB MIDI devices connected over USB OTG
• Virtual MIDI ports published by other apps on your device appear automatically
• Devices are picked up and dropped live, no restart needed

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.

Requires a device with MIDI support (android.software.midi).

What’s new

The first Android release of MIDI Aid, completely rebuilt.

• Live monitor for incoming MIDI events from all connected devices
• Every event decoded into plain language, with raw bytes in hex or decimal
• Filter by device, event type, and MIDI channel
• Pause, resume, and clear the capture
• Works with class-compliant USB MIDI devices over USB OTG