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Moving Picture ExpertsGroup first introduced MP3 players inthe year 1990. The idea was to find a high tech method to compress audio andvideo files. The MP3 system can compress video and audio files while retainingtheir quality almost intact. The MP3 player by doing so is able to store moreand more files. When downloading files to a computer or to any other systemsfrom this gadget, the time factor to download is very insignificant due to thecompression. For example, a song with running time of about 4 minutes takes atleast 40MB on a CD if it is to be recorded on it. Nevertheless, when a MP3player records the same, it takes as low as 4 MB space on it. In this way, musiclovers who own MP3 players, which have a memory capacity of 1 GB, can storeabout 250 songs. The MP3 is the format that is highly compatible with this typeof players. Nevertheless, many other file formats are also recordable onsome MP3 players. Theseformats include WMA, WAV, MIDI, AAC, Ogg Vorbis, ADP CM, ASF, VQF and ATRAC.The difference of this type of player from the others is it does not haveadditional parts to read files such as the earlier models. It is one compactmemory storage device. It has embedded software helping the user to transferMP3 files to the player. The MP3 players also have facilitiesfor copying songs from radio channels, websites, TVs etc. After recording,the MP3 players canmake a list of songs called the Play List. The users can also make the list totheir preferences as well. Although, this gadget seems as one product, itcontains or is integrated with many technologies. If these technologies areconsidered separately, they will not be that impressive but together they makea powerful instrument the MP3 players. The integrated parts of a MP3 playerinclude memory, microprocessor, digital signal processor, playback controls,data port, display, amplifier, power supply, and audio port. When the users of MP3 players plug it to a USB port orparallel port of a PC, the data on the computer can be transferred to theplayer. Normally, the MP3 players connectedto a USB port can transfer files faster than the ones connected to the parallelport. All most every MP3 player is powered with batteries. Many have inbuiltrechargeable lithium batteries. With a single charge, the components can runabout 28 hours. Some are equipped with AC adapters enabling users to plug theminto wall sockets as well.
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