Specifications

Chapter 25: X-Form 139
Unit
Select the desired timebase for the Original and
Processed time fields: Bars|Beats, Min:Sec,
Timecode, Feet+Frames, or Samples.
Shift
Displays the target time compression or expan-
sion as a percentage of the original. Adjust the
Time control or click the Shift field and type the
desired value. Time can be shifted by as much as
12.50% to 800.00% of the original speed (or 8
times to 1/8 of the original duration) depending
on which Range button is enabled (2x, 4x, or 8x).
The default setting is 100%, or no time shift.
The Shift 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
post-production pull up and pull down factors
(see “Using X-Form for Post Production Pull Up
and Pull Down Tasks” on page 143).
2x, 4x, and 8x Range Buttons
The 2x, 4x, and 8x Range buttons set the possible
range for the Time Shift, Pitch Shift, and For-
mant Shift controls.
2x Lets you apply Time Shift, Pitch Shift, and
Formant Shift from 50.00% to 200.00% (where
50.00% is 2 times the original duration and
200.00% is 1/2 of the original duration).
4x Lets you apply Time Shift, Pitch Shift, and
Formant Shift from 25.00% to 400.00% (where
25.00% is 4 times the original duration and
400.00% is 1/4 of the original duration).
8x Lets you apply Time Shift, Pitch Shift, and
Formant Shift from 12.50% to 800.00% (where
12.50% is 8 times the original duration and
800.00% is 1/8 of the original duration).
X-Form Transient Section
Controls
The Transient section provides controls for set-
ting the sensitivity for transient detection and
for adjusting the analysis window size.
Sensitivity
Controls how X-Form determines and interprets
transients from the original audio. Part of X-
Form’s processing relies upon separating “tran-
sient” parts of the sample from “non-transient”
parts. Transient material tends to change its
content quickly in time, as opposed to parts of
the sound which are more sustained. Sensitivity
is only available when Polyphonic is selected as
the Audio Type.
X-Form 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.”
When changing to a smaller Range setting
(such as switching from 8x to 2x), the Time
Shift and Pitch Shift settings are con-
strained to the limits of the new, smaller
range. For example, with 8x enabled and
Time Shift set to 500%, switching to 2x
changes the Time Shift value to 200%.
X-Form plug-in, Transient section