What are the 3-second SMS ringtones?

My mobile phone sucks. There is a message coming, and the bell rings for 3 seconds.

There are usually three kinds of sounds when a mobile phone makes a phone call: real ringtones, special effects ringtones and funny ringtones. The formats are MP3, waw, mmf, midi, etc. With the support of mobile phone manufacturers, different types of contacts can set different ringtones for them to distinguish. Due to the popularity of mobile phones and the diversification of ringtone formats, recording ringtones has become a new generation of industries.

Popular ringtones in 2002 include mp3 ringtone, chord ringtone, midi ringtone and wav ringtone. With the upgrading of mobile phones, new phones even support APE ringtones. Because MIDI is the basis of all ringtone formats, quite a few mobile phones in 1988 adopt or are compatible with MIDI formats. Later, mobile phone manufacturers gradually began to adopt Yamaha chips, and mobile phone enthusiasts began to prefer "live singing" ringtones, so MMF ringtones also occupied a part of the share. With the continuous development of mobile phone ringtones, the shortcomings of short playing time of MMF are gradually revealed (generally, the longest is more than ten seconds). Nokia, Sony Ericsson and other mobile phone giants have launched a new live-action singing format "AMR", which takes a long time to play, but the sound quality is relatively poor. Mobile phone ringtones have developed to 10, and MMF, AMR, MP3 and WAV file formats have gradually become mainstream formats.

The wave of network digital music is caused by MP3. As an audio-visual enthusiast, do you know MP3? MP3 is the abbreviation of MPEG 1 Layer 3, which is said to be a computer file format derived from a German studio when studying how to capture CD tracks. MP3 itself is a computing method of compression and decompression, which is used to process high-speed sound information. The sound quality of the sound file it generates is close to that of CD, but the file size is only one twelfth of its size. Therefore, the original CD can only store about 12 to 20 tracks in CD format; If saved in MP3 format, you can store about 100 songs. This is its charm: downloading from the internet is almost free, with good sound quality and small files. Now it has become very popular and has seriously threatened the market of traditional records.

The full name of MP3 is Audio Layer III of Moving Picture Experts Group. Simply put, MP3 is an audio compression technology. Because the full name of this compression method is MPEG Audio Layer3, people call it MP3 for short. MP3 uses the technology of MPEG Audio Layer 3, and compresses music into files with smaller capacity with the compression ratio of 1: 12 or even1:12. In other words, it can compress files to a smaller extent with little loss of sound quality. But also the original sound quality is well maintained. Because of its small size and high sound quality, MP3 format has almost become synonymous with online music. The MP3 format of music per minute is only about 1MB, so the size of each song is only 3-4MB. Use MP3 player to decompress (decode) MP3 files in real time, thus playing high-quality MP3 music.