iDFX is an innovative patent pending technology that dramatically improves the sound quality of your MP3 and AAC song files.
Both the MP3 and AAC audio formats are “lossy” encoding methods that use data reduction methods to substantially reduce the file size needed to transmit and store a song file.
Audio files contain complex signal information that is spread over a wide range of frequency bands. At a particular time in a song some of these frequency bands will have louder sounds in them while other bands will have softer sounds.
The MP3 and AAC methods reduce the total amount of audio data by using less accuracy to encode the softer sounds, making use of the fact that loss of accuracy of the softer sounds is not as overtly apparent to your ears as loss of accuracy of the louder sounds.
However, we have found that this loss of accuracy of the softer sounds of a song does cause a recording to lose a significant amount of the richness and fullness of the original CD recording, leading to a somewhat “muffled” sound quality. For example, the upper harmonics of an instrument note or vocal can be at a soft level but they are very important to conveying the full rich sound of the note, and they are typically highly diminished in an MP3 or AAC song file.
iDFX compensates for this loss of spectral information by using patent pending technology to re-encode your MP3 and AAC files by intelligently re-synthesizing damaged or missing harmonics while also insuring full low frequency range for the song.
iDFX also sets all your songs to the same standard playback level, so you won’t struggle to hear quieter songs or get blasted by louder songs.
When you compare an iDFX enhanced song to the original MP3 or AAC file, you’ll clearly hear how iDFX for the first time allows your iPod to provide the full rich sound of the original CD recordings, completely eliminating the “muffled” sound of your un-enhanced MP3 and AAC files.
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