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CHP. 9 EDITING, REPAIRING, AND SYNTHESIZING AUDIO
137
Creating new windows with drag-and-drop
Drag-and-drop also allows you to create a new data window from a selection.
1.
Open the Voiceover.pca file.
2.
Create a selection containing “Wow.”
3.
Drag the selection to an empty area of the Sound Forge workspace and drop it. Sound Forge creates a new
data window containing the selection data with the attributes of the original file.
Finding and repairing audio glitches
Glitches are commonly the result of analog audio editing, analog to digital transfer, or electronic noise.
Sound Forge provides you with a tool for locating audio glitches and three distinct tools for repairing them:
channel, interpolate, and replace. In addition, you can repair audio glitches manually using the Pencil tool.
Locating glitches
The Find tool allows you to quickly locate glitches, specific volume levels, or silence in a file. The Find tool’s
glitch algorithm locates glitches by examining the file for instances where the waveform matches the
specified threshold slope and sensitivity criteria. The cursor then moves to the location of the glitch to allow
you to repair it. This tool only locates one glitch at a time. Therefore, it may be necessary to execute this
command several times on a file to locate all glitches.
1.
Open any audio file containing glitches.
2.
From the Tools menu, choose Find. The Find dialog appears.
3.
From the Find drop-down list, choose Glitch.
4.
Adjust the Threshold slope fader to configure the minimum slope that constitutes a glitch.
• A high value detects only glitches with steep slopes.
• A lower value detects glitches with both steep and more gradual slopes.
5.
Adjust the Sensitivity fader to determine the sensitivity of the detection algorithm.
• A high value results in any part of the waveform with a slope greater than the
Threshold slope being
detected as a glitch.
• A lower value forces the algorithm to verify that the slope is indeed a glitch, and not simply a portion of
the smooth waveform.
6.
Click OK. Sound Forge locates the first glitch in the file and marks its location with the cursor.
Tip:
If you can hear glitches that the Find tool does not
locate, decrease the
Threshold slope and increase the
Sensitivity.
Locating additional glitches using the same settings
Once you have configured the settings in the Find dialog, you can find the next glitch in the file without
viewing the Find dialog. To find the next glitch using the current settings, hold while choosing
Find
from the
Tools menu or hold while clicking the Find button ( ) on the Tools toolbar.
Using the key in this way is not limited to finding glitches. You can hold and choose any
command from a menu to repeat the command with the same settings. For more information, see Repeating an
operation on page 134.
Shift
Shift
Shift
Shift