Calculating Tempo With Beat Detective - DigiDesign Pro Tools Reference Manual

• If the tempo and meter of the audio selec-
tion do not match the session's default
tempo and meter, and you are unsure of
the length of the material, enter the Time
Signature and the Start Bar|Beat location;
then start playback, and click the Tap but-
ton repeatedly to automatically calculate
the End Bar|Beat. When using Tap with
long selections, continue to tap until the
End Bar|Beat stabilizes. Once stabilized,
you may need to manually adjust the num-
ber to the nearest bar boundary.
• If the selection's tempo and meter match
the session tempo and meter (see "Calcu-
lating Tempo with Beat Detective" on
page 539), and it aligns correctly with the
session's bars and beats, click the Capture
Selection button. The correct Time Signa-
ture, and Start Bar|Beat and End Bar|Beat
values will be filled in automatically.
Beat Detective, Selection options
As long as the audio material is correctly
aligned with the session's tempo map, use
Capture Selection each time you make a
new selection or make any changes to the
tempo map (such as changing tempo or
meter).
The Selection definition is not retained
when a session is closed and re-opened
To improve Beat Detective's accuracy in ana-
4
lyzing swung notes, select the Contains option
that indicates the smallest sub-division of the
beat contained in the selection. The Contains
option includes quarter-notes, eighth-notes, six-
teenth-notes (the default setting), thirty-sec-
ond-notes, and a triplet modifier. The selected
Contains option determines the groove tem-
plate grid locations for DigiGroove templates.
Calculating Tempo with Beat
Detective
If you know the meter, and start and end points
of the audio selection, use Beat Detective to cal-
culate its tempo.
To calculate a selection's tempo with Beat
Detective:
Make an audio selection in the Edit window
1
and define the selection in the Beat Detective
window as described in "Defining a Beat Detec-
tive Selection" on page 538.
Select Bar|Beat Marker Generation mode.
2
In the Detection section (Normal mode), click
3
Analyze.
Set the Sensitivity slider set to 0%
4
Beat Detective, Detection mode
Chapter 24: Beat Detective 539