The sounds that ring when a mobile phone is called are usually divided into three types: real people, special effects, and funny. The formats include MP3, waw, mmf, midi, etc., and are supported by the mobile phone manufacturer. , you can set different voice settings for incoming calls from different types of contacts to distinguish them. Due to the popularity of mobile phones and the diversification of mobile phone video formats, recording mobile phone videos has also become an emerging industry. Basic introduction Chinese name: Mobile phone *** Foreign name: Mobile phone ringtones Music style: pop, rock, jazz, funny songs Language: Chinese, English, dialect, animal introduction, format, MP3 ***, MIDI ***, MMF ***, file format, *** format, WAV file, bit rate, production method, *** settings, detailed explanation of types, M4r format, introduction to mobile phones *** refers to the music that sounds when the mobile phone is called, also known as Cell phone ringtone. The most popular mobile phone formats in 2002 include mp3 ***, *** ***, midi ***, wav ***, etc. With the upgrade of mobile phones, new mobile phones even support APE. Format ***. Since MIDI is the basis for all mobile phone formats, a large number of mobile phones in 1988 adopted or were compatible with the MIDI format. Later, mobile phone manufacturers gradually began to use YAMAHA chips, and mobile phone enthusiasts began to like "real-person singing" videos, so videos in the MMF format also occupied a part of the market share. With the continuous development of mobile phones, the disadvantages of MMF's short playback time have slowly begun to appear (generally up to ten seconds). Giants in the mobile phone industry such as Nokia and Sony Ericsson have launched a new live singing format "AMR". ", mobile phones with this format have long playback time, but the sound quality is relatively poor. Mobile phone *** has developed to October, and MMF, AMR real-person singing, and MP3 and WAV file formats *** have slowly begun to become mainstream formats. Apple mobile phone*** format is m4r format, which is a special format for Apple mobile phone system. According to the form of expression, mobile phone movies can be divided into: real person movies, special effects movies, funny movies, non-mainstream movies, etc. MP3 *** The trend of online digital music is caused by MP3. As a video lover, do you know about MP3? MP3 is the abbreviation of MPEG1 Layer 3. It is said to be a computer file format derived by a German studio while studying how to capture CD audio tracks. MP3 itself is a compression and decompression calculation method used to process high-rate sound information. The sound file it generates has sound quality close to CD, but the file size is only one-twelfth of that. Therefore, originally a CD can only store about 12 to 20 audio tracks in CD format; if saved in MP3 format, it can store nearly 100 tracks. This is its charm: downloading from the Internet is almost free, with good sound quality and small file size. It is now so popular that it seriously threatens the market of traditional records. The full name of MP3 is Moving Picture Experts Group Audio Layer III. Simply put, MP3 is an audio compression technology. Since the full name of this compression method is MPEG Audio Layer3, people call it MP3 for short. MP3 uses MPEG Audio Layer 3 technology to compress music into smaller files with a compression rate of 1:10 or even 1:12. In other words, it can compress the file to a smaller size with little loss of sound quality. To a small extent. And it also maintains the original sound quality very well. It is precisely because of the small size and high sound quality of MP3 that the MP3 format has become almost synonymous with online music.

The MP3 format of music per minute is only about 1MB in size, so each song is only 3-4 megabytes in size. Use an MP3 player to decompress (decode) MP3 files in real time, so that high-quality MP3 music can be played. MIDI *** MIDI is the abbreviation of Musical Instrument Digital Interface, which means music equipment digital interface. It is a unified communication protocol between electronic musical instruments and between electronic musical instruments and computers. The MIDI file format is also called a frequency synthesis audio file. It uses the symbols (control information) stored in the frequency synthesis audio file to control the encoding and time of the audio signal output by the audio synthesizer on the sound blaster card. Simply put, it is itself It cannot happen, it needs to be converted by the A D driver sound card to produce sound. MIDI is the abbreviation of Musical Instrument Digital Interface. So MIDI is not a real thing, but an internationally accepted standard interface. Through it, various MIDI devices can accurately transmit MIDI information. Advantages: MIDI files do not contain streaming media information, the file size is small, and the sound quality is quite good. Disadvantages: MIDI files are not audio files in the real sense, but audio control files. They do not support real-person original singing or vocal MMF *** MMF format is also called SMAF format. It is a relatively common mobile phone ringtone launched by YAMAHA. There are three common field formats in China: MA2 (16 ***), MA3 (40 ***), and MA5 (64 ***). Features of the MMF format: The MMF *** format can be said to be the best in the world in 1988. Its format is extremely inclusive and supports content such as ***, waveforms, speech synthesis, etc. according to different mobile phone configurations. Sampling rates of the voice part supported by the MMF format: MA2: 4000Hz, 8000Hz. Among them, 4000Hz is mainly used for low-frequency sound effect playback, and 8000Hz is suitable for the production of real-person voices and real singing*** with a doubled feel. MA3, 5: Support frequency sampling of 6000/8000/16000Hz. Advantages: (1) Multimedia expansion, the functions of images, text, and sounds can be expanded on SMAF. You can manage each function independently and embed them all in one file. (2) It can be pure MIDI, PCM (pure vocal), or PCM MIDI (vocal MIDI). File format MFM file format *** The actual expression of MFM format is mfmp, which is the format defined by ROHM chip. Take full consideration of the characteristics of mobile devices. After the original MIDI file is modified, it is directly converted through the conversion tool provided by ROHM or the file is generated by synthesizing midi wav. The file with wav added is the sound effect. It does not distinguish the number of ***. In November, as far as I know, some mobile phones in the Panasonic series support MFM format mobile phones***. Advantages: (1) The data capacity is small, the file can be compressed, and the file can be reduced by more than half to adapt to the shortcomings of the mobile phone's weak CPU processing power and small storage capacity. (2) Extension, the multimedia functions of images, text, and sounds can be expanded on SMAF. You can manage each function independently and embed them all in one file. RMF file format *** RMF is the abbreviation of Rich Music Format (RMF Rich Music Format File). An RMF file contains a series of MIDI music instructions that tell the computer when and how to play the instrument specified by the composer. RMF files are created using editors owned by Beatnik and played through the Beatnik plug-in. RMF files can be embedded into Web pages as a standard object through the embed tag. In addition, the user can individually control the MIDI stream. An element of the music, which means that the music can be muted, mixed, etc.

Interactive options are limited only by the capabilities of the programmer and the limitations of the MIDI specification itself. In May, Beatnik applications range from simple button or rollover sound effects to interactive mixes that allow listeners to freely choose which elements of the synthesized music are played and when. Advantages: (1) The compression rate is large, but the sound quality is good (2) Synthesized by midi and wav, files in this format can be embedded in Web pages. MIDI files saved outside the sequencer are input to the Beatnik editor. middle. When exported, the BeatnikRMF file only contains MIDI commands and audio samples used in the work, thus ensuring that the file size is kept to a minimum. *** Format What is the AMR *** format? Amr is the abbreviation of Adaptive Multi-Rate (audio Codec). It is an audio file (i.e., sound effect file), sourced from CD, MP3, etc. It is similar to MP3, but uses a larger compression ratio than MP3. In April, the AMR format appeared more frequently on some mobile phones in Nokia and Sony Ericsson systems. Disadvantages of mobile phones suitable for girls: (1) This type of mobile phone is produced infrequently, so there are few resources. (2) The storage space occupied is relatively large. WAV Files What is the WAV file format? The WAV format is a sound file format developed by Microsoft. It is also called a waveform sound file. It is the earliest digital audio format and is widely supported by Windows platforms and their applications. The WAV format supports many compression algorithms, multiple audio bits, sampling frequencies and channels. It uses a sampling frequency of 44.1kHz and 16 quantization bits. Therefore, the sound quality of WAV is almost the same as that of CD, but the WAV format requires too much storage space. It is very inconvenient to communicate and disseminate. Bitrate What is bitrate? Bit rate refers to the sampling rate for converting digital sound from analog format to digital format. The higher the sampling rate, the better the restored sound quality. (Original by Hong Xin of NetEase Mobile Forum) Bit rate value compared with actual audio: 16KBPS = telephone sound quality 24KBPS = increase telephone sound quality, shortwave broadcast, longwave broadcast, European standard medium wave broadcast 40KBPS = American standard medium wave broadcast 56KBPS = voice 64KBPS = increase ZTE mobile phone model plus voice (optimal bitrate setting value for mobile phone ***, optimal setting value for mobile phone mono MP3 player) 112KBPS = FM stereo broadcast 128KBPS = tape (optimal setting value for mobile phone stereo MP3 player) value, the best setting value for low-end MP3 players) 160KBPS=HIFI high fidelity (the best setting value for mid-to-high-end MP3 players) 192KBPS=CD (the best setting value for high-end MP3 players) 256KBPS=Studio music studio ( Suitable for music enthusiasts) *** How to download 1 Use a data cable, download to your mobile phone, and then use it Limitations: It is more troublesome to go to a website dedicated to downloading mobile phone ***. 2 Use Bluetooth, infrared and other wireless devices to download to your mobile phone. Limitations: Device restrictions, the downloading mobile phone and the downloaded device must both support the same protocol. Production method In addition to downloading mobile phone software from a website dedicated to downloading mobile phone software, you can also create your own mobile phone code through software. Make a mobile phone *** Simple method: Use NERO software to make the song smaller while retaining the essence of the song, that is, keep the parts you like and remove the redundant parts. 1. Open the NERO software. After entering the interface; 2. Import a song, and the following interpretation interface will appear; The main screen area is the frequency characteristic curve of the song, which of course also represents the position of the different stages of the song. You can use the left mouse button to specify a position where you want to start listening. Of course, it is the essence of a song. You can listen to this part of the song so that you can prepare for the subsequent operations. Next, I will introduce how to operate. First, you need to know where to start intercepting, then you have to start listening from the beginning and see which position is the starting position you want.

Then start selecting from this position, press the left mouse button without letting go, and then drag the mouse to select a piece of music. In fact, this selection is inaccurate. You can use the mouse wheel to extend the frequency band of the song. , which makes it easier to select. You can drag the mouse while listening to see the position you want. After selecting, the position that turns blue as shown in the picture below is selected. Then you can use cut (the icon of scissors) or copy in the toolbar to pick up this part of the song, and then create a new one and paste it over Watch it to see how it works, but it is best to watch it directly after selecting it, so that you can know at that time whether the position you selected is correct, etc. If it is not correct, you can see the backward arrow icon above. , this is the same icon as some office software. Once you’ve selected it, just save it. The processing of the song has been completed, but half of the effect of the song is very good. If the sound is recorded by myself, the effect will not be as good. Then the method to select the desired part is the same as above. Please see below for processing. Everyone has seen the four main functions of this software, volume, effects, tools, and enhancement. It can change the volume of your recorded sound. If the background is noisy when you are recording, it is easy to solve, including Electric students are no problem. *** Setting 1. Phone *** Setting method 1: "Start" menu-gt; Settings-gt; Personal-gt; Phone, and then set the *** and ringing method according to your needs Etc. Method 2: "Start" menu->Settings->Personal->Sounds and Reminders->Notifications, select "Phone: Dial-in" in "Select Events", and select the notification method. Add custom Definition***: Copy your favorite sound files to the "*** directory" above. Be careful not to associate the *** files with the player. 2. How to set up mobile phone ***: "Start" menu -gt;Settings-gt;Personal-gt;Sounds and Reminders-gt;Notifications, select "Inbox: New SMS" in "Select Events", select SMS *** and whether to vibrate, the indicator light flashing time , various parameters such as whether to display information on the screen. The method for setting other system prompt sounds such as emails, reminders, connections, etc. is the same as above. Replace ***: There is no convenient way to change the MMS prompt sound. Find the WAV file in the above directory Replace it with your favorite WAV file, and rename the file to your favorite name. Detailed explanation of types 1. MID *** MIDI is a language. Just like a computer can only understand 0s and 1s, midi is a language commonly used among electronic musical instruments and related equipment. It is a *** (standard midi) multimedia data form. 2. SPMIDI is almost the same as midi***, except that some control information is added to make it suitable for mobile phones. 3. MMF *** /SMAF SMAF is a multimedia data format developed by Yamaha. MMF *** is a file in this format and is also a common format for downloading Samsung mobile phones. SMAFdeguige is defined as a multimedia document format that can be played on portable terminals. SMAF files, compared with similar SMF (standard MIDI files), have the advantages of small file size and strong expressiveness. In 1999, SMAF was mainly used in the production of mobile phone cameras. However, as an extended specification of SMAF, it can also be used for displaying text and graphics. In this way, SMAF provides a space with strong performance and feasibility when producing multimedia tracks on mobile terminals. 4. RTTTL RTTTL format is a standard mobile phone *** format and has been supported by many mobile phones. 5. WAV *** standard sound file format, with "cd sound quality", but compared with other current compressed format files, it takes up too much storage space.

6. WMA *** Windows Media Audio (WMA) file format, which only requires an encoding rate of 64kbps, can achieve CD sound quality. Compared with WAV, the space occupied by the same content, the digital music file is reduced by half. 7. AMR *** Nokia's commercial name for the *** of the WB-AMR format (AWB) has been selected by 3GPP (3rd Generation Partnership Project, the third generation partnership project) as a broadband language codec for GSM and 3GWCDMA applications standard. AMR was proposed by the European Committee for Standardization of Communications and is the most widely used voice standard in mobile communication systems. MMS also adopts this format as a sound standard. 8. STY is a sound format compiled by Microsoft. 9. IMY This is a *** specially designed for use in EMS. It was proposed by Ericsson in 2000 and was recognized by 3GPP as a standard in June 2001. i-Melody *** marks tones based on text. The standardization work is undertaken by IrDA. Ericsson and June Sony Ericsson mobile phone models that support EMS mostly use the i-Melody *** format. 10. PMD *** (CMX format) cmx is a technology used in cdma network format. It allows PMD files to contain text, pictures, animations and sounds, all of which are integrated into a smaller file that can be transferred between handheld devices. PMD files contain audio and/or video. BREW2.0 can play PMD files that mix audio and video, while BREW1.0 and 1.1 can only play audio files. Playing PMD files on a device requires OEM support. 11. mp3 *** Speaking of mp3 ***, we must first mention that MPEG is the English abbreviation of the Moving Picture Experts Group. This expert group was founded in 1988 and is responsible for establishing video and audio compression standards for CDs. MPEG audio files refer to the sound part of the MPEG standard, that is, the MPEG audio layer. MPEG files can be divided into three layers according to different compression quality and encoding complexity (MPEGAUDIOLAYER1/2/3 correspond to the three sound files of mp1, mp2, and mp3 respectively. MPEG audio encoding has a high compression rate, mp1 and mp2 The compression ratios of mp3 are 4:1 and 6:1-8:1 respectively, while the compression ratio of mp3 is as high as 10:1-12:1, which means that one minute of CD-quality music without compression requires 10MB of storage space, and After mp3 compression and encoding, it is only about 1MB, and its sound quality remains basically undistorted. Therefore, mp3 is currently the most common music format on the Internet. MP3 uses an encoding algorithm called "sensory encoding technology" to reduce sound distortion: when encoding. First perform spectrum analysis on the audio file, then use a filter to filter out the noise frequency, and then disperse and arrange each remaining bit through quantization, and finally form an mp3 file with a higher compression ratio, and make the compressed The file can achieve a sound effect that is closer to the original sound source when played back. Although it is a lossy compression, its biggest advantage is that it has minimal sound distortion in exchange for a higher compression ratio. ** Import the mp3 format file into itunes, right-click the song, select "Show Introduction", select "Options" and fill in the "Start Time" and "Stop Time" (within 40 seconds) "OK", then right-click Song, select "Create ACC version" and the same file name will appear, the duration is within 40 seconds. Right-click the newly created song, select "Show in Windows Explorer", and change the suffix in the file name to "m4a" format. Rename to "m4r"