\subsection{VBRfix} This function scans a VBR (Variable Bitrate) MP3 file and updates/creates the Xing VBR header. The Xing header contains information about the VBR stream used to calculate average bit rate, time information and to more accurately fwd/rew in the stream. This function is especially useful when the playback of a file skips, fwd/rew does not work correctly or the time display is incorrect. \opt{recorder,recorderv2fm,ondio}{ \note{Run VBRfix on files you record with your \dap. The header is not present in the recorded files and VBRfix adds this header.}} \note{VBRfix can only run when music is turned off (since it uses the same memory as the player) and can take a while to complete if run on big files.}