Beat Tempo TimeLine

The system functions to handle global events related to tempo changes are
BeatChanged TempoChanged Timeline

Event	Type of Message	GiG	Global	Current	Scriptlet	Song
TempoChanged	SystemEvent	N	N	Y	N	N
BeatChanged	SystemEvent	Y	Y	Y	N	Y
Timeline	SystemEvent	Y	Y	Y	N	Y

TempoChanged Raise an event when the BPM has changed

/******************************************************
//
// Rackspace Script 
// 
******************************************************/

//Allowed in rackspace script only
On TempoChanged(newBPM  : double )
   	Print ("Rack TempoChanged BPM -> " + newBPM)

End

BeatChanged This is a simple callback that is triggered on every beat. it is useful for simple operations such as doing something on every bar or on every 4th bar etc. While this callback has historically been used to create more sophisticated timeline events, we now recommend the new On Timeline callback which is much more efficient for tying events to particular bar/beat pair and does not require any testing to see determine the current bar or beat.

******************************************************
//
// Global Script 
// 
******************************************************/

Var
   wBar : Widget
   wBeat: widget


//Call every time the beat is changed
On BeatChanged(barNumber : Integer , BeatNumber : Integer)
	Print ("Global BeatChanged Bar -> " + barNumber)
	Print ("Global BeatChanged BeatNumber -> " + BeatNumber)
	// Update widgets caption label
	SetWidgetLabel(wBar, barNumber) 
	SetWidgetLabel(wBeat, BeatNumber)
	
	
End

TimeLine This callback should generally be used instead of the On BeatChanged callback, particularly if you want to construct a long timeline as, rather than having to use IF THEN tests to determine the current bar (and actions), this callback is optimized so that the appropriate actions will be called in constant time without the need for user tests.

/******************************************************
//
// Rackspace Script 
// 
******************************************************/

// This callback should generally be used instead of the On BeatChanged callback,
On Timeline
	Prolog
		Print("Prolog :This optional code gets executed before the code for the specific beat is triggered")
	End 
	1:1
	Print("Timeline Playhead just started")
	2:2
	Print("Timeline We are at bar 2 beat 2")
	
	3:4
	Print("We Are at Bar 4 Beat 4 ")
	 
	Epilog
		Print("Epilog :This optional code gets executed after the code for the specific beat is triggered")
	End
End