None. As far as we know the professional mp3 editor software must, for example, recover the damaged mp3 files received or downloaded. The recovering process must include special advance algorithms such as recovery of the frame structure, checking for reading errors, changing the bitrate information which recommending to use for advanced professional users. Sometimes, opening damaged mp3 files in waveform file editors (SoundForge, WaveLab, CoolEdit, Nero Wave Editor etc) the damaged frame in waveform structure will be presented as the silent fragments in one channel for example. If the mp3 file was downloaded or copied for Audio CD burning, simply copy the time fragments of the waveform from "health" channel to bad and saves as the WAV file. If you would like to transfer your mp3 to your portable player, you will need to save as MP3 file with high bitrate to loose minimum of the quality or continue your searching of the professional mp3 editor.
