What is a Monophonic Ringtone?

A monotone ringtone is a melody ringtone composed of a single resonant musical tone, which is different from a chord ringtone.

Single ringtone

Right!

A monotone ringtone is a melody ringtone composed of a single resonant musical tone, which is different from a chord ringtone.

Chinese name

Single ringtone

Foreign name

Monophonic ringtones

The chord is

Combining more than three sounds

SPMIDI

It is suitable for mobile phones to increase control information.

A single tone is a single tone, which can be any tone.

1.MID ringtone

MIDI is a language. Just like a computer can only understand 0 and 1, midi is a language commonly used between electronic musical instruments and related equipment. It is a form of smf (standard midi) multimedia data.

2.SPMIDI

It is almost the same as the midi ringtone, except that it adds some control information for its suitability for mobile phones.

3.MMF ringtones / SMAF

SMAF is a multimedia data form developed by Yamaha. MMF ringtones are files in this format, and also a format commonly used for downloading Samsung mobile phones. SMAFdeguige is defined as a multimedia file format that can be played on a portable terminal. Compared with similar SMF (standard MIDI file), SMAF files have the advantages of small file size and strong expressiveness. SMAF is now mainly used in the production of mobile phone ringtones. However, as an SMAF expansion specification, it can also be used for text and graphic display. In this way, SMAF provides a space with strong performance and feasibility when making multimedia tracks on mobile phone terminals.

4.RTTTL

The RTTTL format is the standard ringtone format for mobile phones and has been supported by many mobile phones.

5.WAV ringtone

The standard sound file format has "cd sound quality", but compared with other current compressed format files, it takes up too much storage space.

WMA ringtones

Windows Media Audio (wma) file format. It only needs a 64kbps encoding rate to achieve cd sound quality. Compared with wav, the occupied space is half the size of digital music files.

7, AMR ringtones

Nokia's commercial name for ringtones in WB-AMR format (AWB) has been selected as the broadband language coding standard for GSM and 3GWCDMA applications by 3GPP (3rd Generation Partnership Project) AMR was proposed by the European Communications Standards Committee and is the most widely used voice standard in mobile communication systems. MMS also uses this format as the sound standard.

8.STY

There is a sound format prepared by Microsoft Corporation.

9.IMY

This is a ringtone specifically designed for use in EMS. It was proposed by Ericsson in 2000 and approved by 3GPP as a standard in June 2001. The i-Melody ringtone marks the tone based on text. Its standardization work is performed by IrDA. Ericsson that supports EMS and the current Sony Ericsson mobile phone models mostly use the i-Melody ringtone format.

10.PMD ringtone (CMX format)

cmx is a technology used in cdma network systems. It allows PMD files to contain text, pictures, animations and sounds. All these elements are integrated into a small file that can be transferred between handheld devices. PMD files contain audio and / or video. BREW 2.0 can play PMD files of mixed audio and video, BREW 1.0 and 1.1 can only play audio files. OEM support is required to play PMD files on the device.

11.mp3 ringtones

When it comes to mp3 ringtones, we must first mention that MPEG is the English abbreviation of Motion Picture Experts Group. This expert group was established in 1988 and is responsible for establishing video and audio compression standards for CDs. MPEG audio file refers to the sound part in the MPEG standard, that is, the MPEG audio layer. MPEG files can be divided into three layers according to the compression quality and encoding complexity (MPEGAUDIOLAYER1 / 2/3 corresponds to three audio files: mp1, mp2, and mp3 respectively. MPEG audio encoding has a high compression rate, mp1 and mp2 The compression ratios are 4: 1 and 6: 1-8: 1, and the compression ratio of mp3 is as high as 10: 1-12: 1, which means that one-minute CD-quality music requires 10MB of storage space without compression, and After mp3 compression coding, it is only about 1MB, and its sound quality remains basically undistorted. Therefore, the current music format mp3 on the Internet is the most common. Perform spectrum analysis on the audio file, then filter out the noise and electric frequency with a filter, and then quantize the remaining bits to arrange them, and finally form an mp3 file with a higher compression ratio, and make the compressed file During playback, it can achieve a sound effect closer to the original sound source. Although it is a lossy compression, its biggest advantage is a very small sound distortion in exchange for a higher compression ratio.