In Freecell Collection you can customize sounds for every events.
Few sounds will come with main events like card move, start, undo, redo, autoplay, win etc.
Events are categorized as Game, Favorites, Pending List, Statistics, Customize, Tools and Help. Under this events are listed.
To change sounds for an event, Select the event and click Browse to select a 'wav' file. Click on the play to preview the file.