Audacity in Detail
Keep in mind that Audacity supports nearly unlimited undo, so it is safe to experiment. Undo works even after saves; you lose your undo history only when you close your project file.
When you work on a project, Audacity does not operate directly on your audio files. Instead, it copies them into a temporary file, chops them into a lot of little pieces, and converts these to files with .au extensions that play only in Audacity. You can see this by viewing your project directories in any file manager. There is a single .aup file for each project; this contains all the metadata Audacity needs to put these little files back together with the correct settings. When you open an Audacity project from your file manager, select the .aup ...
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