Specifications

Pro Tools Reference Guide338
Generating Beat Triggers
Once you’ve accurately defined the selection
range, Beat Detective can generate beat triggers
based on detected peak transients. The range
and type of transients found can be adjusted
with the Detection settings, allowing you to
zero in on the bars, beats, and sub-beats in the
material, while avoiding the non-rhythmic con-
tent.
To generate beat triggers for the selection:
1 In the Edit window, make an audio selection.
2 In the Beat Detective window, select one of
the following modes:
• Bar|Beat Marker Generation
• Groove Template Extraction (Pro Tools 6.x
only)
• Region Separation
3 Define or capture the selection as described in
“Defining a Beat Detective Selection” on
page 336.
4 From the Analysis pop-up menu, choose one
of the following detection algorithms:
• High Emphasis, works well with high fre-
quency, inharmonic material, such as cym-
bals and hi-hats, while avoiding low
frequency material.
• Low Emphasis, works well with low fre-
quency material, such as bass guitar and
kick drum, as well as with most harmonic
material, such as piano or rhythm guitar.
5 Click the Analyze button.
6 Depending on the rhythmic content of the se-
lection, set the Resolution to Bars, Beats, or Sub-
Beats.
7 Adjust the Sensitivity slider until beat triggers
appear on the beats and sub-beats in the selec-
tion.
Bar triggers are indicated with thick lines, beat
triggers with medium lines, and sub-beat trig-
gers with thin lines.
8 In Pro Tools 6.x, you can zoom to the sample
level and click the Scroll Next button to scroll to
the next trigger within the selection. To scroll to
the previous trigger, Alt-click (Windows) or Op-
tion-click (Macintosh) the Scroll Next button
(see “Navigating Consecutive Beat Triggers” on
page 341). This is useful to confirm that the beat
triggers are appearing in the appropriate loca-
tions. If false triggers appear between the beats or
sub-beats (representing non-rhythmic material)
delete them (see “Deleting Beat Triggers” on
page 339), or reduce the Sensitivity value.
9 To display the metric locations for the triggers,
select the Show Trigger Time option.
10 If you cannot get the beat triggers to appear
at the right locations, repeat steps 4–9 trying the
other Analysis algorithm (High or Low Empha-
sis). In addition, see the following tips.
Beat Detective, Detection (Normal mode) options
Beat triggers
BarBeat
Sub-Beats