VBR (Variable Bit Rate) MP3 files may report false time length.
Many MP3 programs estimate the duration of an MP3 based on the first bitrate they find and file size, but when jumping through a file the positions aren’t the same.
Half way through a VBR mp3 file, may not be half way through the song. VBR MP3s often have a special tag at the beginning to inform the player about how to treat the VBR file.
VbrFix is a small and effective utility that can create/replace this special tag. It can also be used to remove unrecognized data from the mp3 and spot other problems.
I use this program again and again, and every time works fine, saves me a lot of trouble. VbrFix is a reliable and very useful application, if you use VBR mp3 files.