Sound files with the SWA extension are called "super audio format files". It is a high-compression audio file. The compression ratio with wave files is generally 24:1, which is higher than MP3. Much higher, and very close to the compression rate of the recently launched MP3pro. Generally speaking, the sounds in multimedia works mainly include human voices, music sounds and sound effects. Most software supports the WAV sound format, but it takes up a lot of space, so the sound quality requirements are not particularly high, but the When taking up little storage space, almost all multimedia works produced using Authorware use the SWA format to transmit sound information.

In Authorware 4.0 and later versions, you can directly play SWA as a built-in format. In fact, as long as your system has an MP3 decoding program installed, or the player program supports the MP3 format, you don’t have to worry about SWA. can be played because both MP3 and SWA files belong to the MPEG Audio Level 3 format - MP3 belongs to MPEG Audio Level 3 I, and SWA belongs to MPEG Audio Level 3 II. Therefore, you can play SWA using Windows Media Player and Winamp. Although the SWA format is not explicitly mentioned in their playlists, as long as you set the file type to "All Files" and then open a SWA format file, or directly Drag and drop SWA files onto their playback interface, and you will hear the sound information in SWA.