Scripter Javascript Tutorial

56 Trace() and JSON

MDN: Global Objects: JSON

An important consideration when working with Scripter-sourced objects (as opposed to objects you create yourself) is that Trace() will output two different results to the console depending on how the event is used. Both methods are typically needed to get a complete picture of an event. In addition to using JSON as shown previously, there is also using Trace() on the event itself:

function HandleMIDI(event) {
	Trace(event);
}

...which results in the following output in the console:

[NoteOn channel:1 pitch:61 [C#3] velocity:100]

The properties shared by the two outputs are channel, pitch, and velocity. When working with a new track, using both the JSON trace and the plain Trace() are beneficial to understand just what is happening.