“takeamidi” is a MIDI monitoring tool / MIDI filter / live sampler that allows you to quickly grab recent data as a MIDI file

The application’s MIDI buffer contains recent 10 seconds / 1 minute / 10 minutes of MIDI input;
The recording can be paused and cleared with appropriate buttons

You can export the contents of the buffer by dragging a “file” icon in the lower left corner of the app window.

Log window shows data of the selected time range

You can use this app as a MIDI filter. It supports Channel, System Common, Realtime and System Exclusive messages to be displayed and / or filtered.

Standalone and AUv3