Convert music file formats in iTunes on PCYou can convert a song to a different file format (and keep a copy of the original). For example, you can save a copy of a compressed song file such as or in an uncompressed song format ( or ).When converting from a compressed to uncompressed file format (for example, from MP3 to AIFF), you shouldn’t notice any reduction in sound quality. However, when converting between compressed formats (for example, MP3 and AAC), you might notice a reduction in the sound quality. For the best results, if you want your music encoded in a different file format, the music again from the original source using the new .Important: You can convert iTunes Store purchases only if they’re songs.Go to the iTunes app on your PC.Choose Edit > Preferences, click General, then click Import Settings.In the Import Using pop-up menu, choose the format you want to convert songs to, then click OK to save the settings.Select one or more songs in your library, then choose File > Convert > Create [format] Version.The song in its original format and the newly converted song appear in your library.See also, Convert music file formats in iTunes on PC. You can convert a song to a different file format (and keep a copy of the original). For example, you can save a copy of a compressed song file such as MP3 or AAC in an uncompressed song format (AIFF or WAV)., All iTunes songs are delivered in 256k AAC format, unless you have some pre-2010 128k DRM laden purchases attached to your account. You cannot persuade iTunes to download them in a higher quality format, nor would there be any benefit in converting them to AIFF..