Audio files (music, narration, sound effects, etc.) are represented on slides with speaker icon.
![](https://thepowerpointblog.com/media/blogs/all/12_Jul/AudioEQ.jpg?mtime=1343029089)
Here is the speaker icon used in PPT 2003
![](https://thepowerpointblog.com/media/blogs/all/12_Jul/Speaker_1.jpg?mtime=1343029099)
Here is the speaker icon used in PPT 2007 and 2010
![](https://thepowerpointblog.com/media/blogs/all/12_Jul/Speaker_2.jpg?mtime=1343029108)
In addition, when you rollover a PPT 2007/2010 speaker icon a mini player bar is displayed
![](https://thepowerpointblog.com/media/blogs/all/12_Jul/Speaker_3.jpg?mtime=1343029118)
– Troy @ TLC