Data port: to transfer the data to the player MP3 it will have USB port, firewire port or parallel port. Audio output: have a stereo Jack 3.5 mm headphone or external speakers. Some have built-in speakers, although they tend to be of low quality. Controls: they can vary from simple buttons or wheels with associated to touchscreen buttons. Screen: an MP3 player can carry or not screen, and in that case can be anything from a simple monochrome display of two lines to large high-resolution color screens.
Battery: they operate with rechargeable battery and adapter network. Software: lets you play MP3 files and create playlists of songs. Audio format MP3 formats It allows to compress audio keeping a close to CD quality at ten times less space. For example, a 4 minute song will occupy 40 MB on a CD, but only 4 MB in MP3 format. The disadvantage of the MP3 format is that you lose quality, since it is a lossy compression format. The advantage is that it takes much less memory, so that we can store more songs in the same space and download songs from the Internet more quickly. Although the MP3 format is the most well known, there are other audio formats that usually can also be played on an MP3 player, which can be of various types.
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