Apple Logic Pro 7 - Manual (Page 615)

Chapter 19 Synchronization 615
Positioning Objects to Frames (Pickup Clock)
Set the song position to the required SMPTE time, by going to a specific frame of the
film in the Video track, for example. Select the object that you want to place at this
time position. It doesn’t matter whether this is an individual event, tempo event or a
Region. Pickup Clock Position then sets the start time of the object as required, Pickup
Clock and select next event selects the next object after moving your current selection.
This allows you to quickly continue after making alterations.
When using Pickup Clock with Audio Regions, it is the Region’s Anchor (not start point)
that is moved to the song position.
Fixing Objects to Frames
In situations where you’re working with synchronized film, you often want specific
sound effects to play at a specific SMPTE time, rather than a particular bar position.
If the tempo of the piece needs to be altered at a later stage, the SMPTE time location
of events that have already been positioned will change. The Lock SMPTE Position
function prevents this from happening.
You can SMPTE-lock individual events in the Event List, or entire Regions (along with all
events they contain).
Lock SMPTE Position
This function “locks” selected objects to their current SMPTE position. If there are any
subsequent tempo changes, the bar positions of the “locked” objects are adjusted
accordingly. You can tell that an object or event is locked to a SMPTE position by the
small padlock symbol in front of its name.
Copies of locked objects do not preserve their locked status, whether copied/pasted
via the Clipboard, or by dragging while Option is held down.
Unlock SMPTE Position
All selected objects that were “locked” to their SMPTE position are now fixed to their
current bar position, just like normal events. This means they can be shifted by any
future tempo changes. The padlock symbol in front of the name disappears.
Moving the SPL by Frame
In addition to the usual position commands, you can also use the Rewind One Frame
and Forward One Frame key commands to move one frame backwards or forwards.