What are the ringtones?

At present, the ringtone function of mobile phones mostly refers to whether the ringtone effect is single tone or chord; Memory ringtone capacity; Self-editing ringtone function/recording ringtone function; Download the main functions such as ringtone function.

Monotonous/chord/live singing

Monotonous: monophonic ringtones refers to the sound in which the bell is composed of a single tone. Monotonous ringtones can be said to be out of date.

Chord: Chord is superimposed on the interval on the basis of the root sound according to the rule of three-degree superposition.

Live singing: At present, most mobile phones support live singing ringtones, such as mmf, wav, wma, mp3, aac, etc. Ringtones sung by real people are very popular at present.

Memory ringtone

At present, mobile phones have their own memory ringtones. Generally, most of these ringtones are current famous songs or popular songs, and the number or type of ringtones is controlled by mobile phone manufacturers.

Write/record ringtones

With the increasing popularity of mobile phones, people's requirements for mobile phones are getting higher and higher. Mobile phone is not only a communication tool, but also a manifestation of people's personality, so more and more people are reluctant to use only the ringtones provided by manufacturers. In this way, the self-editing/recording function came into being. It can edit or record other sounds as its own ringtone according to users' own hobbies.

Download ringtone

The function of downloading ringtones allows users to download ready-made ringtones online or by other means, which can not only meet the personalized needs of users, but also avoid the troublesome process of self-editing.

Ringtone format

MID(MIDI format):

Supported models: Almost all models support ringtones in mid format, and the mid chords supported by the lock are different due to their different sound chords.

MIDI is not a device. MIDI is a language. Just as computers can only understand 0 and 1, MIDI is a common language between electronic musical instruments and related equipment, which is the abbreviation of "musical instrument digital interface". It is SMF (standard MIDI) multimedia data format. Its standard file format is: mid.

The so-called chords: The number of chords in a mobile phone is equal to the number of tracks in midi format, but each track in the mobile phone is a single-tone track, which is the biggest difference from midi that we often listen to on the computer, and also the origin of the influence of the number of chords on the ringtone effect.

A chord is a combination of three or more sounds at the same time or successively according to a certain interval relationship, which is called "chord". In traditional harmony, three-dimensional superposition is the principle of chord formation. Usually pronounced at the same time When you press 1, 3, 5 on the piano at the same time, the sound is major triad with 1 as the root. The advantage of chords is that the sound is full, beautiful and expressive. Major triad sounds loud, and the minor chords are euphemistic.

The so-called electronic music midi format is to record the timbre, sound name, loudness, angle, time and so on of each sound, and query the color library according to the record to get the sound to be emitted. Simply put, each track corresponds to an instrument, and the music played by the instrument at each moment is recorded in a specific format. For example, at a certain moment, a chord composed of the above-mentioned 135 is recorded on the audio track defined as piano, and then the chip queries the sound library to get the corresponding sound effect, and then performs synthetic playback. Therefore, the sound library is the key factor that affects whether midi is good or not, and a good sound library occupies a lot of space.

The method of recording music by mobile phone is the same as or similar to midi. The recorded sounds are all single tones, and no complicated chord sound effects are recorded. In that case, why are our mobile phones so beautiful? Since you can't press "135" on one piano at the same time, you can press 1, 3 and 5 on three pianos at the same time. In fact, this is how cell phone chords are realized. Although this kind of chord is not as good as the real chord, it is almost confusing to release it from the mobile phone. This process of changing a chord on one instrument into a single tone of N instruments seems to be called "chord decomposition". If you often use psmplay to convert ringtones, when the converted midi is complicated, you will be prompted that "the number of broken strings exceeds16 ..." Similarly, many songs that sound good on the computer are directly transmitted to the mobile phone without decomposition, and the effect is much worse. As long as you look at it with a good midi editing software, you can find that there are often many tracks in a song with the same tone, and each track is a tone.

Therefore, a 16 "chord" mobile phone can make five instruments emit three chords at the same time, and a 40 "chord" mobile phone can make five instruments emit seven chords at the same time, or 13 instruments emit three chords at the same time, or ...... The more "chords" there are, the more combinations there may be, and the richer the timbre will be. This is the sound effect difference caused by the number of "chords" in mobile phones. At present, the mobile phone ringtones sold in the domestic market can be roughly divided into monosyllabic ringtones, 3 chord ringtones, 4 chord ringtones, 16 chord ringtones, 32 chord ringtones, 40 chord ringtones and 64 chord ringtones. Monotone and chord are very different; The tones of chord 4 and chord 16 are too simple and quite different. The ringtones of chords 40 and 32 are not very different, but the ringtones of chords 64 and 40 are very different. In short, triad and quartile are a level, 16 chord is a level, 32 chord and 40th chord are a level, and 64 chord is a level.

We ordinary consumers can't hear the difference between chords because our ears are not professionally trained. If each of us can hear how many chords there are in a piece at a time, then everyone can become a musician. Chords only play the role of embellishment, which does not mean that the more chords, the more beautiful the music will be. SPMIDI:

It's similar to midi, but it adds some control information to make it suitable for mobile phones.

RTTTL:

RTTTL format is a standard ringtone format, which has been supported by many mobile phones. Composer for Ringtone is a ringtone making tool, which can be used to convert midi format files into works.

WAV(WAVE format): comparable to CD sound quality

Supported models: dopod 696, 5 15, 535, Nokia 3650, Sony Ericsson P908, etc.

WAV is the suffix of WAVE file, which is the resource format for Microsoft to save audio information on Windows platform.

On PC, MIDI and WAVE are two main formats of sound data files. The former is a data file format, and the latter is a waveform digital file format, which exists in the computer like other files. Common CD turntables are also made by digital sampling technology, but there are no files. So the sound quality of WAV audio is comparable to that of CD. But for mobile phones, WAV has a fatal disadvantage, that is, the file is too large-1min 10MB WAV audio. How many mobile phones can swallow such a huge audio file at present?

Audio in WAV format can be played by Windows' own media player, so most smartphones with Windows mobile operating system support WAV as ringtone.

AMR(AMR format): A universal voice format for multimedia information.

Supported models: Alcatel OT756, Siemens CX65, etc.

Like ADPCM, AMR is not a special ringtone format, but a format widely recognized by major mobile phone manufacturers to save mobile phone recordings. Because the capacity of AMR file is very small-the AMR audio size can be controlled at around 1K per second, even the audio file with the length of 1 minute can meet the current technical specification of China Mobile that the multimedia message should not exceed 50K, so AMR is the only format for loading human voices into multimedia messages.

But because of its small size, the sound quality of AMR format songs can be imagined. According to the author's actual operation, Alcatel OT756 and Siemens CX65 can record their own ringtones and save them as AMR format audio files, but compared with MP3 ringtones supported by OT756 or WAV ringtones supported by CX65, the volume, clarity and layering of AMR ringtones are completely different. However, as a voice ringtone, AMR also has its own advantages, that is, the convenience of production-turn on the recording function, and the recorded sound can be used as a ringtone, which is not fast.

Because it is an audio file commonly used in MMS, most MMS phones that support recording function can record and play AMR ringtones, but it should be noted that being able to record and play does not necessarily mean that it can be set as an incoming ringtone.

Take Panasonic G60, Samsung X608 and Sony Ericsson Z608 as examples. All three mobile phones can record AMR and play it well, but this is only a part of its recording function, which does not belong to the category of ringtones, so AMR is not supported as a ringtone.

There are many similar models. Consumers who are interested in "voice phone" need to consult the sales staff before buying.

WMA(WMA format): An audio format advocated by Microsoft.

Supported models: Shenda 8390, dopod 565 and other mobile phones equipped with Windows mobile operating system.

WMA is the abbreviation of Windows Media Audio, which is a digital music format introduced by Microsoft. Its biggest feature is copyright protection, and its compression ability is stronger than MP3.

According to the official information released by Microsoft, WMA format is extremely protective, even limiting the playing machine, playing time and playing times, which is a very useful compression technology for record companies as copyright owners.

In addition to copyright protection, WMA also deepened the compression ratio, with the goal of producing better sound quality at a lower sampling frequency. However, compared with MP3, WMA can only be regarded as "the elite among civilians". Although 64kbps WMA is indeed better than 128kbps MP3 after waveform restoration, the reason is that low-traffic MP3 discards too much high-frequency information when encoding, and the sound quality and file size of WMA are not better than 128kbps MP3. Because it is a technology developed by Microsoft, it is currently only used on smartphones with Windows mobile operating system, and its scope is very limited.

Stalk swelling:

There is a Microsoft compiled sound format.

MMF(SMAF format): MIDI platform adds vocal effects.

Supported models: NEC N8 series, Samsung T 108, T408, INNO 80, 90, etc.

Do you still remember the two mobile phones INNO 80 and INNO 90 that the Korean brand INNO has been working hard for half a year in the China market? One of their selling points is "real ringtone", and the suffix of this ringtone file is MMF. MMF is a file in SMAF format, which is the abbreviation of synthetic music mobile application format and a multimedia data format developed by Yamaha. The specification of SMAF is defined as the form of multimedia documents that can be played on portable terminals. Compared with similar SMF (standard MIDI document), SMAF document has the advantages of small size and strong expressive force. In fact, MMF is a MIDI file, and the working principle of MMF is essentially similar to MIDI.

Because it is based on MIDI platform technology, the number of cell phone chords has a certain influence on the sound effect of MMF. The same WAV is converted into MMF of 16 chord and MMF of 40 chord respectively, and the MMF of 40 chord is obviously better than that of 16 chord.

MP3(MP3 format): the best balance between capacity and sound quality

Supported models: Motorola E398, C650, V303, Sony Ericsson K700C, K500C, etc.

MP3 is the abbreviation of MPEG- 1 Audio Layer 3. It is a speech compression technology. By processing the original audio signal with a special data compression algorithm, the size of the digital audio file can be only one tenth of the original. As a ringtone, the biggest advantage of MP3 is that it can compress voice files to one tenth or even one twelfth of the original.

The audio file of 1 min only needs about 1M to be stored in MP3 format. Because of its small size and good sound quality, MP3, which dominates PC, is also the darling of mobile phone manufacturers-Motorola and Sony Ericsson have loaded MP3 ringtone function into their latest products.

Since it is "close", it shows that there is still a gap between the sound quality of MP3 and CD. Although it sounds like MP3 music is still close to the sound quality of CD, it is still a bit inferior to WAV, which can challenge the sound quality of CD.

ADPCM(ADP format): ringtone format evolved from recording function.

Supported models: LG G8 10, Philips 9 @ 9c, etc.

ADPCM, also known as ADP, is often used to record MP3 players and mobile phones. In fact, it is also a coding format, which has the advantage of smaller files. However, if you have high requirements for the sound quality of human voice ringtones, the performance of ADP will definitely disappoint you. Because it is only an audio format with recording as its main function, ADP can handle some simple voices, but in the face of complex music or songs, the sound quality can only be described as terrible.

At present, many Philips mobile phones on the market support ADP ringtones, such as 530, 535 and 9 @ 9c. When making ADP ringtones, WAV audio files should be used as the source files for conversion in order to obtain the best sound quality.

PMD(CMX format):

Supported models: LG C650, Sanyo SCP-550, etc.

Cmx is a technology used in cdma network standard. It allows PMD files to contain text, pictures, animations and sounds. All these elements are integrated into a relatively small file, which can be transferred between handheld devices. A PMD file contains audio and/or video. BREW2.0 can play PMD files with mixed audio and video, while BREW 1.0 and 1. 1 can only play audio files. Playing PMD files on devices requires OEM support.

IMY(iMelody format):

Supported models: moto E398, Siemens C62, CF62, etc.

This is a ringtone specially designed for EMS, which was proposed by Ericsson in 2000 and accepted as a standard by 3GPP in June of 20001year. I-Melody ringtone is a text-based way to mark tones, and its standardization work is undertaken by IrDA. Ericsson and Sony Ericsson, which support EMS, now mostly use i-Melody ringtone format.