Marker Event

The Marker event has three subtypes. The end Marker event ( Figure 8 ) marks the end of a series of events. The beat Marker event marks the beat and the tempo Marker event indicates the tempo.

Figure 8 Marker event of subtype End

Marker event type	first nibble value = `011X`
Subtype	8-bit unsigned subtype
Value	16-bit signed value

The Marker subtype bit field contains zero for an end marker (kMarkerEventEnd ), 1 for a beat marker (kMarkerEventBeat ), or 2 for a tempo marker (kMarkerEventTempo ).

The value bit field varies according to the subtype:

For an end Marker event, a value of 0 means stop; any other value is reserved.
For a beat Marker event, a value of 0 is a single beat (a quarter note); any other value indicates the number of fractions of a beat in 1/65536 beat.
For a tempo Marker event, the value is the same as a beat marker, but indicates that a tempo event should be computed (based on where the next beat or tempo marker is) and emitted upon export.

Macro call used to stuff the Marker event's long word:



 
qtma_StuffMarkerEvent(x, markerType, markerValue)

Macro calls used to extract fields from the Marker events long word:



 
qtma_MarkerSubtype(x)

qtma_MarkerValue(x)

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