I have several thousand mp3 files that I want to trim the silence from both ends of the file.
Audition is probably the wrong tool for the job in this case as it would have to decode and then re-encode the file once edited. This would result in degraded sound quality. In order to preserve the sound quality of the mp3 file you need to find something like mp3directcut that works directly on the mp3 without having to decode it.
Cheers
James.