You can add sound to your movie at authoring time by importing a
sound into a layer of a timeline. Furthermore, you can set the volume
and pan for that sound at authoring time. However, to control the
during runtime, you must use a
Sound object, you can programmatically
control sounds in ways that you cannot at authoring time, including:
Attaching sounds from the library
Loading external MP3s
Starting and stopping playback based on user input, server responses, or other runtime events
Adjusting the sound panning and volume based on user input, server responses, or other runtime events
Controlling the playback position of a sound (such as user-controlled seek, fast-forward, and rewind)
Accessing the sound’s total duration
Reading song data (artist name, title, etc.) from ID3 tags (for loaded MP3s only)
Sound objects control the sounds that exist
within a movie clip—whether those sounds were placed within the
movie clip at authoring time or attached or loaded into the movie
clip at runtime using ActionScript. It is possible to place multiple
sounds within a single movie clip; however, doing so is poor practice
because it prevents you from controlling the sounds individually.
Rather, in most cases, you should create separate movie clips for
each sound and create a separate
Sound object to
target each movie clip.
The hierarchy of movie clip timelines also comes into play with sounds. The volume and panning for sounds in ...