Music playerAbout encoded audioApplications like Windows Media Player and Nokia AudioManager encode audio files with codecs like WMA or MP3to save storage space. The encoding is done by removingthose parts of the audio signal that are not audible or onlybarely audible by human ear.Regardless of the encoder and codec quality, the soundquality of the resulting file is not as good as the original.The basic codecs supported by this device are AAC, WMA,and MP3. All of these have different variations.BitratesWhen encoding audio, the quality of the resulting sounddepends on the sample rate and bit rate used for theencoding. Sample rate is expressed as thousands ofsuch as AAC+ and enhanced AAC+ (eAAC+) provide CDquality audio at bitrates as low as 48 Kbps. Classical musicand music with nuances usually require a higher bitratethan basic pop music.For speech or other sources where the quality of the soundis less important than saving storage space, you can usebitrates between 8 and 64 Kbps. At low bitrates WMA orAAC generally gives better results than MP3.Variable bitrateYour device also supports variable bitrate (VBR). Variablebitrate means that the bit rate of the encoding varies withthe complexity of the encoded material. When using VBR,the encoding is optimized to preserve a constant audioquality throughout the track, rather than losing quality forcomplex music sections as with constant bitrate (CBR)
