Compress a sound for export

  1. Do one of the following:

    • Double-click the sound’s icon in the Library panel.

    • Right-click (Windows) or Control-click (Macintosh) a sound file in the Library panel and select Properties from the context menu.

    • Select a sound in the Library panel and select Properties from the Panel menu in the upper right corner of the panel.

    • Select a sound in the Library panel and click the Properties button at the bottom of the Library panel.

  2. If the sound file has been edited externally, click Update.
  3. For Compression, select Default, ADPCM, mp3, Raw, or Speech.

    The Default compression option uses the global compression settings in the Publish Settings dialog box when you export your SWF file. If you select Default, no additional export settings are available.

  4. Set export settings.
  5. Click Test to play the sound once. Click Stop if you want to stop testing the sound before it finishes playing.
  6. Adjust export settings if necessary until the desired sound quality is achieved, and then click OK.

ADPCM and Raw compression options

ADPCM compression sets compression for 8- or 16-bit sound data. Use the ADPCM setting when you export short event sounds such as button clicks.

Raw compression exports sounds with no sound compression.

Preprocessing

Converts mixed stereo sounds to monaural (mono) when you select Convert Stereo To Mono (mono sounds are unaffected by this option).


Sample Rate

Controls sound fidelity and file size. Lower rates decrease file size but can also degrade sound quality. Rate options are as follows:

5 kHz

Barely acceptable for speech.


11 kHz

The lowest recommended quality for a short segment of music and one-quarter the standard CD rate.


22 kHz

A popular choice for web playback and half the standard CD rate.


44 kHz

The standard CD audio rate.


Note: Flash cannot increase the kHz rate of an imported sound above the rate at which it was imported.

mp3 compression options

MP3 Compression

lets you export sounds with mp3 compression. Use mp3 when you are exporting longer stream sounds such as music sound tracks.

If you are exporting a file that was imported in mp3 format, you can export the file using the same settings the file had when it was imported.


Use Imported mp3 Quality

Default setting. Deselect to select other mp3 compression settings. Select to export an imported mp3 file with the same settings the file had when it was imported.


Bit Rate

Determines the bits per second in the exported sound file. Flash supports 8 through 160 Kbps CBR (constant bit rate). When you export music, set the bit rate to 16 Kbps or higher for best results.


Preprocessing

Converts mixed stereo sounds to monaural (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.

Quality

Determines the compression speed and 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.



Speech compression option

Speech compression exports sounds using a compression that is adapted to speech.
Note: Flash Lite 1.0 and Flash Lite 1.1 do not support the Speech compression option. For content targeting those player versions, use mp3, ADPCM, or Raw compression.
Sample rate

Controls sound fidelity and file size. A lower rate decreases file size but can also degrade sound quality. Select from the following options:

5 kHz

Acceptable for speech.


11 kHz

Recommended for speech.


22 kHz

Acceptable for most types of music on the web.


44 kHz

The standard CD audio rate. However, because compression is applied, the sound is not CD quality in the SWF file.



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