MACROMEDIA FLASH MX 2004-USING FLASH Use Manual page 211

To use MP3 compression:
In the Sound Properties dialog box, select MP3 from the Compression menu.
1.
Deselect Use Imported MP3 Quality (the default setting).
2.
For Bit Rate, select an option to determine the bits per second in the exported sound file. Flash
3.
supports 8 through 160 Kbps CBR (constant bit rate). When you are exporting music, set the
bit rate to 16 Kbps or higher for the best results.
For Preprocessing, select Convert Stereo to Mono to convert mixed stereo sounds to monaural.
4.
(Mono sounds are unaffected by this option.)
Note: The Preprocessing option is available only if you select a bit rate of 20 Kbps or higher.
For Quality, select one of the following options to determine the compression speed and
5.
sound quality:
Fast yields faster compression but lower sound quality.
Medium yields somewhat slower compression but higher sound quality.
Best
yields the slowest compression and the highest sound quality.
Using the Raw compression option
The Raw compression option exports sounds with no sound compression.
To use raw compression:
In the Sound Properties dialog box, select Raw from the Compression menu.
1.
For Preprocessing, select Convert Stereo to Mono to convert mixed stereo sounds to monaural.
2.
(Mono sounds are unaffected by this option.)
For Sample Rate, select an option to control sound fidelity and file size. Lower rates decrease
3.
file size but can also degrade sound quality. Rate options are described in the following list:
5 kHz is barely acceptable for speech.
11 kHz
is the lowest recommended quality for a short segment of music and is one-quarter of
the standard CD rate.
22 kHz is a popular choice for web playback and is half the standard CD rate.
44 kHz is the standard CD audio rate.
Note: Flash cannot increase the kHz rate of an imported sound above the rate at which it
was imported.
Compressing sounds for export 211