Apple Logic Pro 7 - Manual (Page 601)

Chapter 18 Tempo 601
Stretch Existing Tempo Curve
This function stretches or compresses an existing tempo curve. The Position or Time
values are used to define the start point of the Region that you want to change. You
can then enter either the new end point of the tempo curve as a bar position or SMPTE
value, or set a Stretch value for the curve (as a percentage).
Thin Out Existing Tempo Changes
Position or Time defines the start and end points of the area to be processed. Density
determines the number of tempo events that will remain per bar after processing. You
can select values between one per bar (1/1) and eight times per bar (1/8).
Randomize Tempo
Position or Time defines the start and end points of the area to be processed.
Randomize determines the amount of deviation from the current tempo, in beats per
minute (bpm).
Density defines how often the new tempo events will occur. You can select values
between one per bar (1/1), and eight times per bar (1/8).
Tempo Interpreter
The computer keyboard and/or incoming MIDI events can be used to set the
sequencer tempo. Put another way, Logic allows manual synchronization (also known
as “human sync”).
The Tap Tempo key command must be assigned to a particular key (any key can be
used), or to a particular MIDI event in the Key Commands window.
The sync is fairly loose, in that if the manual sync impulses stop coming in, the
sequencer continues at the last tempo it received.
If you have an Unitor, a Mark Of The Unicorn interface (a MIDI Time Piece or MIDI
Express), you can convert percussive audio signals into MIDI notes. This feature lets you
use (say) a bass drum track (either live or from tape), to control Logic’s tempo.
You can enter manual sync mode in the following ways:
• manually, using the Sync menu;
• automatically in auto sync mode, if Logic encounters a Tap Tempo command.
The parameters that control Logic’s response to tap tempo commands can be found in
the Tempo Interpreter window.