MP3 Doctor is an editing tool that lets you check, modify, and improve all your MP3s and WAVs in several ways. You can repair imperfect songs or modify them with trimming, equalizing, resampling, and a very efficient and improved normalization feature, and more (stretch, pitch, karaoke...). The goal is to let you maintain a similar quality, volume and sound on all your existing MP3s. In addition, it comes with encode and decode options (MP3 to WAV / WAV to MP3). You can modify hundreds of files with one click using 'Batch' mode or use 'Single' mode to process one file at time. In addition it can handle ID tags of MP3 files. This version is a major Update that includes a very optimized Normalize function that allows to get the lower parts of a song to higher levels. With this Super-Normalize feature the user could get all your songs to the best level possible. A new Karaoke feature was added, that lets the user to remove the vocals of an MP3 or WAV file. This functions works exactly by the same principle of the hardware vocal removers and get then similar results. Most songs could get the vocals removed, however it depends more on the effects and proccessing that the vocals has during the recording. On the other side, some other sounds of the song could be removed by using the Karaoke function, user can't expect to remove all the vocals on every file. New pitch and tempo features added that let user change tempo (bmp) without changing the pitch or viceversa, ideal for remixes.