Use the options in the Export Settings area of the Sound Properties dialog box to choose sound compression options. The options available depend on the compression method you select.
Default Uses the default compression settings in the Publish Settings dialog box when you export your movie. No additional options are available for this setting.
ADPCM Sets compression for 16-bit sound data. Use the ADPCM setting when you are exporting short event sounds such as button clicks. When you select ADPCM, Convert Stereo to Mono, Sample Rate, and ADPCM bits options are displayed.
Convert Stereo to Mono Mixes stereo sounds to mono. Mono sounds are unaffected.
Sample Rate Sets the export rate for the file. Higher rates yield better sound fidelity and larger sound files. Lower rates save disk space. Rate options, in either mono or stereo, are as follows: 5 kHz is barely acceptable for speech; 11 kHz is the lowest recommended quality for a short segment of music and is a quarter of the standard CD rate; 22 kHz is a popular choice for web playback and is half the standard CD rate; and 44 kHz is the standard compact disc (CD) audio rate. Flash cannot improve the quality of sounds. If a sound is recorded at 11 KHz mono, Flash continues to export it at 11KHz mono even if you change the sampling rate to 44Khz stereo.
ADPCM Bits Determines the number of bits used in ADPCM encoding. Greater compression rates yield smaller sound files but poorer sound fidelity. 2-bit is the smallest, lowest quality option; 5-bit is the largest, best quality option.
MP3 Lets you export sounds with MP3 compression. Use MP3 when you are exporting longer, stream sounds such as music soundtracks. When MP3 compression is selected, Preprocessing, Bit Rate, and Quality options are available.
Bit Rate Determines the maximum bit rate of the sound produced by the MP3 encoder. The MP3 Bit Rate parameter is only shown when you select MP3 encoding as the compression option. When you are exporting music, set the bit rate to 16 Kbps or higher for the best results. The Convert Stereo to Mono option is not available at 16Kbps or lower.
Quality Lets you choose between Fast, Medium, or Best. Use the Fast setting if you are publishing your movie on a web site. Use Medium or Best if you are running your movie on your hard drive, or on CD.
RAW Exports sounds with no sound compression. You can select the Convert Stereo to Mono option and sample rate when this setting is selected.