Flash Templates Tutorials - Sound - Sound import
Imported sound, as opposed to the image, is not displayed in the Timeline but is placed directly into the library of the project. If you want the sound to begin with a certain frame when playing the movie you need to add sound to the Timeline or directly in the primary scene (in the background sound or effects synchronized with the image), or in a particular symbol such as button (for events sound or a specific symbol accompanied by the sound).
Select File / Import to insert AIFF or WAV files into Flash. Flash stores sounds in the library along with the symbols. Sounds take a big amount of disk space and RAM. Usually, it is better to use 22 kHz 16-bit mono sound (stereo takes twice space than mono). Flash can import 8 - or 16-bit sounds with 11 kHz, 22 kHz or 44 kHz sample rate. Flash can convert sounds with a reduction of sampling rate while exporting. You need only one copy of the sound file to use this sound in any number of places in your clip.
Sounds recorded in formats not multiple of 11 kHz (such as 8, 48 or 96 kHz) convert when they are imported into Flash, and the sound quality will be lower or higher than the original (depending on which frequency is closer).
To import the sound:
If you want to add sound effects in Flash, it is better to import 16-bit sounds.
If you have little RAM, make your audio clips small or work with 8-bit sounds instead of the 16-bit.