How do I fit a selection within a specific timeframe?
To change the duration of an entire audio file, select Filter > Pitch and Tempo and enter the desired total duration of the file. The duration is in the format “hours′′minutes′seconds.fraction” so 3′05.00 is three minutes and five seconds. (The symbol represents the prime mark for minutes and double prime mark for hours, but is entered with the apostrophe and double quote keys.) The pitch of the audio will stay the same.