This situation is generally caused by the imported music not meeting the conditions. Take flash 8 as an example: it requires the imported music bit rate (bit speed) to be 128Kbps and the sampling rate to be 44.1KHZ in mp3 format. music. Because the bitrates and sampling rates of some audio files are different, some music cannot be imported into flash. You can first check whether the bitrate (bit speed) of the music you want to import meets the above conditions.

The method is: point the pointer to the selected music file, and a prompt will automatically appear. One of the items is the bit speed, and the following value is the bit rate. If some audio files do not meet the above conditions, software can be used to convert them.