Repeat
From Audacity Manual
Repeat repeats the selection the specified number of times.
Number of times to repeat
Specifies the number of times the selected audio will be repeated; the default setting is 10 repeats.
New selection length
Shows what the resultant selection length will be, depending on the specified number of repeats. The resultant selection includes both the originally selected audio and the inserted audio that has been repeated.
- If the selection to be repeated borders the right edge of an audio clip, each repeat becomes a separate clip bordered by black vertical split lines.
- Any audio to right of the inserted repeats is moved to right, and so not overwritten. However the repeat will not be allowed if it would move other clips and "Editing a clip can move other clips" in Tracks Preferences is unchecked.
- Repeat does not copy the original or resultant selection to the Audacity clipboard.