The MIDI Tracer window, which is accessed by selecting Window > MIDI Tracer from the main menu, is similar to the MIDI List Editor in that it displays MIDI information as tabular text, and has a vertical flow (i.e. the events follow a top to bottom time-oriented order).
Its use is different however, as it is not bound to a specific region or track; the MIDI shown in the MIDI Tracer window is any global input or output Ardour presents to the system. As such, it is a very useful way to monitor MIDI traffic, whether it is an external controller or device or the input or output of any track.
The window consists of:
|Port||A list of all the MIDI ports Ardour presents to the system. They are both internal and external and are the same ports Ardour presents to JACK, if enabled|
|The events list||Where all the events for this port are listed, see below|
|Line history||How many lines should be kept in the events list; once this limit is reached, older events will be removed from the list|
|Delta times||If checked, shows the times as the duration since the last event, instead of absolute times|
|Decimal||If checked, shows the MIDI data as decimal values instead of hexadecimal|
|Enabled||If checked, events are displayed in the events list as they occur, otherwise stops the logging|
|Auto-Scroll||If checked, the events list scrolls as new events are logged, keeping the newest events on screen|
The events list displays the events as columns:
|Time of the event||Either absolute or relative, based on the Delta times checkbox|
|MIDI status (event type)||What MIDI events happened (e.g. Note On, Note Off, Pitch Bend, etc.)|
|MIDI channel||The MIDI channel the event happened in|
|MIDI data bytes (event parameters)||Parameters of the event, e.g. for a Note On: what the note was, and its velocity|