User manual

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Audio processing and functions
Detect Silence
The Detect Silence function searches for silent sections in
an event and either splits the event, removing the silent
parts from the project, or creates regions corresponding
to the non-silent sections.
• To open the Detect Silence dialog, select one or several
audio events in the Project window or the Audio Part Edi
-
tor. On the Audio menu, open the Advanced submenu and
select “Detect Silence”.
If you select more than one event, the Detect Silence dialog allows you to
process the selected events successively with individual settings or to
apply the same settings to all selected events at once.
Adjustments in the waveform display
The upper part of the dialog displays a waveform image of
the selected audio event. In case you have selected sev-
eral audio events, the waveform of the event that you have
selected first is shown. You can make the following ad
-
justments:
• With the zoom slider below the waveform to the right,
zoom in and out on the waveform.
You can also click in the waveform, keep the mouse button pressed, and
move the mouse for zooming. Move the mouse down to zoom in and
move it up to zoom out.
• If you have zoomed in on the waveform, it may not be
completely visible anymore. In this case, the scroll bar to
the left of the zoom slider allows you to scroll through the
waveform.
You can also use the mouse wheel for scrolling through the waveform.
• If the Linked option in the Detection section is deacti-
vated, you can use the green square at the beginning and
the red square at the end of the audio file to graphically ad-
just the Open and Close Threshold values (respectively).
When “Linked” is activated, you can use either square to
adjust both values.
The Open and Close Threshold values in the Detection section reflect
these changes.
Making settings and processing
The lower part of the Detect Silence dialog provides set-
tings for the detection and processing of “silent” sections.
Proceed as follows:
1. Adjust the settings in the Detection section to the left.
The settings have the following functionality:
Setting Description
Open
Threshold
When the audio level exceeds this value, the function
“opens”, i.
e. lets the sound pass. Audio material below
the set level is detected as “silence”. Set this value low
enough to open when a sound starts, but high enough to
remove unwanted noise during “silent” sections.
Close
Threshold
When the audio level drops below this value, the function
“closes”, i.
e. sounds below this level are detected as “si-
lence”. This value cannot be higher than the Open
Threshold value. Set this value high enough to remove
unwanted noise during “silent” sections.
Linked If this checkbox is activated, the Open and Close Thresh-
old values are always set to the same value.