Syncing Sounds to the Timeline Sync Sounds to the Timeline Select the keyframe on the Timeline containing the sound you want to sync.. Adding Effects and Looping Sounds Add Effects and
Trang 1When you sync a sound to the Timeline, you're essentially instructing Flash how to play the sound Syncing sounds is a fundamental operation because choosing the wrong sync operation can drastically change how the sound plays out during the execution of the Flash movie Flash gives you the ability to choose a separate sync operation for each indi-vidual sound file When you place the sound on the Timeline, the Properties panel displays the audio properties for the selected sound and lets you define individual properties for every sound in your Flash document For example, you have a background music sound that's located in several scenes, and you want to make sure it doesn't play on top of itself (Sync: Stop) Or, you have a narration that you want per-fectly synced to an animation on the Timeline (Sync: Stream)
Syncing Sounds to
the Timeline
Sync Sounds to the Timeline
Select the keyframe on the
Timeline containing the sound you
want to sync
Click the Window menu, and then
click Properties to open the
Property Inspector
Click the Sync list arrow, and then
select from the following options:
◆ Event When you select Event
(default) the sound plays when
the record head reaches the
keyframe containing the sound,
and continues to play until the
end of the sound If the record
head reaches another keyframe
that contains the same sound, it
will begin playing on top of the
original sound
◆ Start Doesn’t allow the sound
to play on top of itself
◆ Stop Stops a sound if it is
already playing, without
affecting any other sounds
◆ Stream The Stream Sync
creates sounds synchronized to
the Timeline This is useful for
matching sounds to a particular
visual event in the movie If the
video can not keep up with the
audio, Flash will automatically
drop video frames to keep the
audio synchronized
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Trang 2Once a sound is imported into Flash and placed on the Timeline, you can add sound effects and determine the number of loops When you loop a sound, you're instructing the Flash movie to repeat the sound a given number or times, or to loop the sound forever Some sounds loop better than others For example, you create some background music, and you want it to continue to play for as long as the visitor is on that particular page, but you don't want the sound to have a definable beginning or end In addition to loops, you can also add effects to a sound, including fades in and out, and fade to the left or right channel
The effects applied will only modify the selected audio file Each copy
of an audio file dragged into a Flash movie is controlled independently
Adding Effects and
Looping Sounds
Add Effects and Loop Sounds
Select the keyframe on the
Timeline containing the sound you
want to change
Click the Window menu, and then
click Properties to open the
Property Inspector
To add effects to the sound, click
the Effect list arrow, and then
select an option:
◆ Left Channel/Right Channel
Plays sound in the left or right
channel
◆ Fade Left To Right/Fade Right
To Left Changes sounds from
one channel to the other
◆ Fade In Increases volume
◆ Fade Out Decreases volume
◆ Custom Creates custom in and
out sound points using the Edit
Envelope
To loop a sound, click the list
arrow, and then select an option:
◆ Loop Click Loop to force the
sound into an infinite loop
◆ Repeat Click Repeat, and then
enter the number of times you
want the sound to loop (up to
65,535)
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Trang 3Sooner or later, you're going to want to export your Flash movie that contains audio as an SWF file The process of publishing is relatively painless; however, there are a few considerations as to the compres-sion of the files, which will be important to the size and playability of the Flash movie Publishing requires knowledge of where the document will be used For example, if the document is to be streamed over the Internet, and your visitors have relatively low bandwidth, you would want to choose compression settings that would significantly reduce the size of the audio files It's possible that the Flash document is intended for playing off a CD/DVD; in that case, you could increase the compression settings When you're designing a Flash document, it's imperative that you understand the end game and design the document toward that goal Always remember that you can design a Flash docu-ment, but it's your visitors that ultimately will see, and use it
Publishing Documents
Containing Audio
Publish Sound Documents
Click the File menu, and then click
Publish Settings.
Click the Formats tab, and then
select the Flash (.swf) check box.
Click the Flash tab.
Click the Set buttons for Audio
Stream or Audio Event
Select other sound options as
desired:
◆ Select the Override Sound
Settings check box to override
any sound settings applied to
the individual sound files within
the active Flash document
◆ Select the Export Device
Sounds check box to export
sounds suitable for devices,
such as mobile devices, instead
of the library sound
Click the Compression list arrow,
and then select from the following
options:
◆ Disable Turns off all sound
compression options and
instructs Flash not to export
sounds
◆ ADPCM Performs minor
compression to the audio files
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Trang 4◆ MP3 Creates audio files,
especially music files, with
excellent quality in a small file
size
◆ Raw Leaves the sounds intact
without any compression
schemes applied
◆ Speech Creates optimized files
for the human voice
Select the Convert Stereo To Mono
check box for the ADPCM and
RAW compression formats
Based on your Compression
selections from step 5, select the
following options:
◆ Sample Rate Available for
ADPCM, Raw, and Speech
compression The higher the
sample rate the better the
quality, but the bigger the file
◆ ADPCM bits Higher bit values
translate into better quality
audio, but larger file sizes
◆ Quality Available for MP3
compression The Best option
gives the finest quality, but
produces a larger file
◆ Bit Rate Available for MP3
compression The higher the
value, the better the quality and
the bigger the file
Click OK.
Select the Override Sound
Settings check box to take priority
over the individual settings applied
to the audio files
Select the Export Device Sounds
check box to export device sounds
with the published Flash movie
Click OK.
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Changing Audio File Quality
You cannot publish a Flash movie with audio files that are better quality than the originals For example, if the MP3 audio files you're using have a Bit rate of 16kbps, increasing that to 48kbps does not create a better quality audio file In fact, that’s true of most Flash objects, not just audio To increase the quality of an audio file would require the use of an audio application You can find sound programs
at www.downloads.com
For Your Information
Trang 5Flash is not a major sound editing application For example, you can't trim or cut audio files, nor can you enhance audio or reduce hum and background noises Flash expects all that to be done before you import the file However, you do have some control over when the sound begins and ends (time in, and time out), and you do have control over the volume (fade in and fade out) Making sure that your audio file is clean and smooth flowing will help with the quality of your audio file
Editing Sounds
Work with Edit Envelope
Select a keyframe on the Timeline
that contains an audio file
Click the Window menu, and then
click Properties to open the
Property Inspector
Click the Edit button.
Click the Effect list arrow, and then
select a channel, fade, or custom
effect
Drag the Time In marker to the
right to change where the audio
file begins
Drag the Time Out marker to the
left to change where the audio file
ends (the Time Out marker appears
at the end of the audio file)
Click the Envelope lines to adjust
the volume on the right or left
channels
Use the Zoom buttons to increase
or decrease the size of the audio
file in the edit window
Click the Play or Stop buttons to
test the changes to the audio file
Click the Time Marker buttons to
change the marker code from
frames to seconds
Click OK to save your changes.
IMPORTANT Adjusting an
audio file using Edit Envelope only
impacts the select instance of the
audio file The original audio file
(in the Library) is unaffected by
these changes
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Trang 6Adobe Soundbooth is a program that allows you to record and modify sound files If you have Soundbooth installed on your computer, you can edit imported sounds in Soundbooth directly from within Flash When you’re done editing the sound file in Soundbooth, you can save the file and your changes automatically appear in Flash If you change the name or format of a sound after editing it, you’ll need to re-import the modified file back into Flash You can edit all different sound file formats
in Soundbooth If you want to non-destructively edit sounds, then use the default sound file format (ASND) in Soundbooth for the best results
Editing Sounds Using
Soundbooth
Edit a Sound Using Adobe
Soundbooth
Click the Window menu, and then
click Library to open the Library
panel
Right-click (Win) or Control-click
(Mac) the sound file you want to
edit, and then click Edit with
Soundbooth.
The sound file opens in Adobe
Soundbooth
Edit the sound file using
Sound-booth tools and commands
◆ Use Help in Soundbooth to edit
the sound file the way you
want
When you’re done, save the sound
file in Soundbooth Click the File
menu, and then click Save.
◆ To save the changes in a
non-destructive format, save the file
using the ASND file format, the
default in Soundbooth
◆ If you change the name or
format of a sound after editing
it, you’ll need to re-import the
modified file back into Flash
Quit (Mac) or exit (Win)
Soundbooth to return to Flash and
view the edited version of the
sound file in the Library panel
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