FlipBook lets you have up to 3 soundtracks per scene depending on which version you choose. Each soundtrack can hold one sound file and it can synched to start anytime in the scene that you want (see Sound Sync). Sound files come in an infinite variety of file formats and compression methods. FlipBook uses Windows or OS X to process sound files so whatever sound codecs you have available to your operating system should be available for FlipBook. But in general FlipBook likes WAV, MP3 and AIF files.
To import a sound file, highlight the soundtrack (column) that you want it to go into click on File > Import > Sound. You can drag the image of the sound file up and down to synchronize it. The sound will stop playing at the end of the scene. So if you have a short scene and a long sound file, you won’t hear the whole sound file.
Sound files take up valuable memory so it’s best to trim the sound file to the size you need for the scene to save memory space.