In an underground in the morning.
Pupils, employees, craftspeople – many of them have one thing in common. They listen to music: rock or classical music, techno or folk, country or jazz.
The players are small and light, a lot of people use their mobiles or smart phones.
How is that possible, considering that huge amounts of digital data are required for transmitting and saving music?
MP3 has drastically changed the world of music. With the MP3 method, the amount of data can be considerably reduced without undesirable quality loss. Thus, music can be transmitted via the Internet and saved on MP3 players.