I have recorded 36 mini discs on to separate Audacity projects, and split each project into individual tracks. I want to get these onto my iPod but each track plays as long as the longest track on the project, so I end up with periods of silence. Eg - 20 tracks on the project - if all are 4 minutes long but one is 7 minutes long, the 4 minute tracks carry on playing even after the end of the track, for 7 minutes in total. The Cut or Delete functions do not make any difference. Can anyone help?! Thank you.
You should be able to select one song track by clicking just above MUTE and use File > Export Selected to get exactly that track. Watch what you’re doing. If the selection goes all the way to the right instead of stopping at the end of the music, then you may need to cut the silence from the end of the track and then select it.
Koz
You could use one Audacity track, labelling the track breaks then File > Export Multiple… . See Splitting a recording into separate tracks - Audacity Manual.
If you need more help, please give us the necessary Audacity and Windows version information (see the pink panel at the top of the page).
Gale
Hi - exporting the single tracks appears to be working. They play too long in Audacity, but when exported to MP3, only the actual playing time is copied. Thanks a lot. 
That defeats the whole purpose of the time saving of File > Export Multiple though. If you were using Export Multiple, either have just one Audacity track and label the track breaks, or if you want multiple Audacity tracks, type the file names in the Name for each track (don’t use labels) then when you Export Multiple, choose “Split files based on: Tracks”.
Then Audacity 2.1.1 (if that is what you are using) won’t get confused.
Gale