6.0

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Audio processing and functions
2. Click the Compute button.
The audio event is analyzed, and the waveform display is redrawn to indi-
cate which sections are considered “silent” according to your settings.
Above the Compute button, the number of detected regions is displayed.
Ö If you activate the Auto checkbox next to the Compute
button, the audio event is analyzed (and the display is up-
dated) automatically every time you change the settings in
the Detection section of the dialog. Deactivate this option
when you are working with very long files, as this process
might take some time.
3. Click “Preview” to listen to the result.
The event is played back repeatedly in its entire length, but with the
“closed” sections silenced.
4. Adjust the settings in the Detection section until you
are satisfied with the result.
5. In the Output section, activate the “Add as Regions”
or the “Strip Silence” option, or both.
“Add as Regions” will create regions according to the non-silent sec-
tions. “Strip Silence” will split the event at the beginning and end of each
non-silent section, and remove the silent sections in between.
Ö If you activate the “Add as Regions” option, you can
specify a name for the regions in the Region Name field. In
addition to the name, the regions will be numbered, start
-
ing with the number specified in the “Auto Number Start”
field.
Ö If you have selected more than one event, you can ac-
tivate the “Process all selected Events” checkbox to apply
the same settings to all selected events.
6. Click the Process button.
The event is split and/or regions are added.
Ö If you have selected more than one event and did not
activate the “Process all selected Events” option in the
Output section, the dialog opens again after processing,
allowing you to make separate settings for the next event.
The Spectrum Analyzer
This function analyzes the selected audio, computes the
average “spectrum” (level distribution over the frequency
range) and displays this as a two-dimensional graph, with
frequency on the x-axis and level on the y-axis.
1. Make an audio selection (a clip, an event or a range
selection).
2. Select “Spectrum Analyzer” from the Audio menu.
A dialog with settings for the analysis appears.
Min. time
open
Determines the minimum time that the function will remain
“open” after the audio level has exceeded the Open
Threshold value.
If the audio contains repeated short sounds, and you find
that this results in too many short “open” sections, try
raising this value.
Min. time
closed
Determines the minimum time that the function will remain
“closed” after the audio level has dropped below the
Close Threshold value.
Set this to a low value to avoid removing sounds.
Pre-roll Allows you to cause the function to “open” slightly before
the audio level exceeds the Open Threshold value. In
other words, the start of each “open” section is moved to
the left according to the time you set here.
This is useful to avoid removing the attack of sounds.
Post-roll Allows you to cause the function to “close” slightly after
the audio level drops below the Close Threshold value.
This is useful to avoid removing the natural decay of
sounds.
Setting Description