Adding Sound to a Movie

To add sound to a movie, you assign a sound to a layer and set options in the Sound panel. It is recommended that you place each sound on a separate layer.

Importing the sound file:

1. Choose FILE/IMPORT.
2. Navigate to the file you want to import and select it.
3. This places the file in the library.

To add a sound to a movie:

1. Import the sound if it has not already been imported to the library.
2. Choose INSERT / LAYER to create a layer for the sound.
3. With the new sound layer selected, drag the sound from the library onto the Stage. The sound is added to the current layer.
   You can place multiple sounds on one layer, or on layers containing other objects. However, it is recommended that each sound be placed on a separate layer. Each layer acts like a separate sound channel. The sounds on all layers are combined when you play back the movie.
4. From the Sound panel, choose a sound file.
5. Choose an effect option from the Effects pop-up menu:
   
   None applies no effects to the sound file. Choose this option to remove previously applied effects.
   Left Channel/Right Channel plays sound in the left or right channel only.
   Fade Left to Right/Fade Right to Left shifts the sound from one channel to the other.
   Fade In gradually increases the amplitude of a sound over its duration.
   Fade Out gradually decreases the amplitude of a sound over its duration.
   Custom lets you create your own In and Out points of sound using the Edit Envelope.
   
6. Choose a synchronization option from the Sync pop-up menu:
   Event synchronizes the sound to the occurrence of an event. An event sound plays when its starting keyframe is first displayed and plays in its entirety, independently of the Timeline, even if the movie stops. Event sounds are mixed when you play your published movie.
   An example of an event sound is a sound that plays when a user clicks a button.
   
   Start is the same as Event, except that if the sound is already playing, a new instance of the sound is started.
   Stop silences the specified sound.
   
   Stream synchronizes the sound for playing on a Web site. Flash forces animation to keep pace with stream sounds. If Flash can't draw animation frames quickly enough, it skips frames. Unlike event sounds, stream sounds stop if the animation stops. Also, a stream sound can never play longer than the length of the frames it occupies. Stream sounds are mixed when you publish your movie.
   An example of a stream sound is the voice of a character in an animation that plays in multiple frames.
   
   If you use an MP3 sound as a stream sound, you must recompress the sound for export. See Compressing sounds for export.
   
7. Enter a value for Loop to specify the number of times the sound should loop.
   For continuous play, enter a number large enough to play the sound for an extended duration. For example, to loop a 15-second sound for 15 minutes, enter 60.
   Note: Looping stream sounds is not recommended. If a stream sound is set to loop, frames are added to the movie and the file size is increased by the number of times the sound is looped.