题目内容
The Sel time display fields have nothing to do with your selection.
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The commands of delete silence, convert a selection to silence and add silence to an audio file are in the Edit, Transform and Generate menu respectively.
Amplitude, Delay Effects, Noise Reduction and Special are all commands in the Transform menu.
The audio file format is decided when you record the sound.
The audio file format is sure to be MP3 when created by Cool Edit.
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