Threshold slope

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 theand 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 Shift while choosing Find from the Tools menu or hold Shift while clicking the Find button ( ) on the Tools toolbar.

Using the

Shift

key in this way is not limited to finding glitches. You can hold

Shift

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.

 

 

 

 

 

CHP. 9

EDITING, REPAIRING, AND SYNTHESIZING AUDIO