Specifications

Chapter 17: Time Shift 87
Time
The Time section of Time Shift provides controls
for specifying the amount of time compression
or expansion as well as the timebase used for cal-
culating TCE. Adjust the Time control to change
the target duration for the processed audio.
Original Displays the Start and End times, and
Length of the edit selection. Times are displayed
in units of the timebase selected in the Units
pop-up menu.
Processed Displays the target End time and
Length of the processed signal. Times are dis-
played in units of the timebase selected in the
Units pop-up menu. You can click the Processed
End and Length fields to type the desired values.
These values update automatically when adjust-
ing the Time control.
Tempo Displays the Original Tempo and Pro-
cessed Tempo in beats per minute (bpm). You
can click the Original Tempo and Processed
Tempo fields to type the desired values. The Pro-
cessed Tempo value updates automatically
when adjusting the Time control.
Unit Select the desired timebase for the Original
and Processed time fields: Bars|Beats, Min:Sec,
Time Code, Feet+Frames, or Samples.
Speed Displays the target time compression or
expansion as a percentage of the original. Adjust
the Time control or click the Speed field and
type the desired value. Time can be changed
from 25.00% to 400.00% of the original speed
(or 4 to 1/4 times the original duration). The de-
fault setting is 100.00%, or no change. 25.00%
results in 4 times the original duration and
400.00% results in 1/4 of the original duration.
The Speed field only displays up to 2 decimal
places, but lets you type in as many decimal
places as you want (up to the IEEE standard).
While the display rounds to 2 decimal places,
the actual time shift is applied based on the
number you typed. This is especially useful for
typing post production pull up and pull down
factors (see “Post Production Pull Up and Pull
Down Tasks” on page 90).
Formant
The Formant section of Time Shift lets you shift
the formant shape of the selected audio inde-
pendently of the fundamental frequency. This is
useful for achieving formant correct pitch shift-
ing. It can also be used as an effect. For example,
you can formant shift a male vocal up by five
semitones and it will take on the characteristics
of a female voice.
The Formant section is only available when
Monophonic is selected as the Audio Type. The
Formant section provides a single control for
transposing the formants of the selected audio
Time Shift plug-in, Time section
Time Shift does not receive Bars|Beat and
Feet+Frame information from Pro Tools 7.0
or 7.1. Consequently, Bars|Beats and
Feet+Frames are displayed as “N/A.”