Pro Tools 101_ An Introduction to Pro Tools 11 ( PDFDrive )

Time Scales and Rulers
Every Pro Tools session uses a Main Time Scale and a Sub Time Scale. The
Main Time Scale is the time format used for Transport functions; selection
Start, End, and Length fields; and Grid and Nudge values. The Sub Time
Scale provides additional timing reference and can be displayed along with
the Main Time Scale in the Counters areas of the Edit window and the
Transport window.
Pro Tools also provides various Rulers to help you navigate along the
Timeline. Rulers can be displayed for a variety of time formats, including but
not limited to the time formats used for the Main Time Scale and Sub Time
Scale. Rulers appear in the Timeline display area at the top of the Edit
window.
Main Time Scale
When the Main Time Scale in a Pro Tools session is set to Min:Sec,
Timeline locations are represented in minutes and seconds relative to the
start point of the session. When set to Bars|Beats, Timeline locations are
represented in bars, beats, and ticks relative to the start point of the session
(Bar 1, Beat 1).
The Main Time Scale determines the timebase units used for the following:
▪ The Main Counter in the Edit window
▪ The Main Location Indicator in the Transport window
▪ Selection Start, End, and Length values
▪ Pre- and Post-Roll amounts
▪ Initial Grid and Nudge values
The Main Time Scale can be set to Bars|Beats, Minutes:Seconds, Time Code,
Feet+Frames, or Samples. To set the Main Time Scale, do one of the
following:
▪ Select the desired timebase using the VIEW > MAIN COUNTER menu.
Figure 2.33 Main Counter menu