Movie Magician is a tool to edit and manipulate audio and video files.
Some of the operations you can do with Movie Magician are: change the speed of the music, slowing it down or making it faster as you like; apply sound effects to the audio; change the pitch (without affecting the video speed); repeat the same set part of a video/audio many times; take screenshots of set video frames, etc.
With Movie Magician you can also slow down some scenes, delete parts of the video, adjust the duration of a movie, etc. Also, Movie Magician lets you generate playbacks from videos in MPG, MPEG, AVI, WMV, MOV, MP4, 3GP, etc formats.