Trim Menu

Trim in the Edit menu.

Use Trim commands to remove everything outside the selection or to remove leading or trailing silences. Trim is similar to cropping images to remove unwanted parts. Note that if only some channels are selected in a multichannel sound, the end of those channels is padded with silence. As an alternative, you can use the Copy To command to save the selection to a separate file.

Beginning

Beginning in the Edit | Trim submenu.
{Trim button in the Toolbar (if added).

Use Trim Beginning to remove audio before the start marker. If not all channels are selected, the area is replaced with silence instead.

End

End in the Edit | Trim submenu.
Trim} button in the Toolbar (if added).

Use Trim End to remove audio after the finish marker. If not all channels are selected, the area is replaced with silence instead.

Both

Both in the Edit | Trim submenu.
Trim button in the Toolbar.
Trim edit command in the Add Edit window of Batch Processing.

To trim:

Select the part of the sound you want to keep.
Choose Trim from the Edit | Trim submenu.

Silence

Silence in the Edit | Trim submenu.
TrimS button in the Toolbar (if added).
Trim Silence edit command in the Add Edit window of Batch Processing.

Use Trim Silence to remove leading and trailing silences from the ends of the selection. Unlike other trim commands, Trim Silence works within the selection and does not remove anything outside the selection. Be sure the selection contains all the leading and trailing silences to be removed. Noise Reduction and Maximize Volume are recommended before using this effect to ensure a consistent silence level.

To remove all silences throughout the selection, use Silence Reduction instead.

Trim Silence Settings
Setting	Description
Silence to keep (s)	Sets the amount of silence to leave on the ends. Use zero to remove all silence. Extra silence is not added if the existing silence is less than this amount.
Threshold (dB)	Sets the highest level of background noise that should be considered silence. If the audio has a lot of background noise or hiss, use values above -30dB. If the audio is clean, use values below -40dB.
Leading silence, Trailing silence, Both	Sets the end of the selection to trim. `Leading silence` removes the silence at the beginning of the selection. `Trailing silence` removes the silence at the end of the selection. `Both` removes silences from both ends. If only some channels are selected in a stereo or multichannel sound, then only that channel is trimmed. Since it is not possible for one channel to be longer than another, the ends of the trimmed channels are padded with silence, which results in trailing silence. All channels must be selected.

To completely trim silences from both ends of the entire file:

Use Select All from the Edit menu.
Choose Trim Silence from the Edit menu.
Enter 0 for Silence to keep.
Enter -40 for the Threshold.
Select Both.
Choose OK.