Highest sound quality: wav=flac=ape>aac>ogg>mp3>wma
Performance (that is, comprehensive sound quality volume coding rate): aac>ogg>flac ape>mp3>wav wma
eaac+ format is a new generation of optimized music format for mobile phones.
The extension of eaac+ is M4A.
It can be close to CD sound quality and takes up less storage space than MP3 format.
MP3.: The highest bit rate is 320K, and its shortcoming is that the high frequency part is one-size-fits-all. The sound quality is not high!
Classic WAVE
WAVE file, as the most classic Windows multimedia audio format, is widely used. It uses three parameters to represent sound: sampling number, sampling frequency and channel number.
The sound channels are divided into mono and stereo, and the sampling frequencies are generally 11025Hz (11kHz), 22050Hz (22kHz) and 44100Hz (44kHz). The capacity occupied by WAVE files = (sampling frequency × sampling bits × channels) × time/8 (1 byte = 8 bit).
Traditional MOD
MOD is a music format similar to a wavetable, but its structure is similar to MIDI, uses real samples, and is small in size. In the previous DOS era, MODs are often used as background music for games. Today's MODs can contain many audio tracks in many formats, such as S3M, NST, 669, MTM, XM, IT, XT and RT, etc.
Computer Music MIDI
MIDI is the abbreviation of Musical Instrument Data Interface. It uses digital means to record the sound played by the musical instrument (each note is recorded as a number), and then , and then synthesize these records through FM or wavetable during playback: FM synthesis simulates the sound of musical instruments by mixing sounds of multiple frequencies; wavetable synthesis stores the sound samples of musical instruments in the sound card waveform table, and then reads the sound from the waveform during playback. The table is taken out to produce a sound.
MP3, the leader
MP3 is famous. It uses MPEG Audio Layer 3 technology to compress the sound with a compression rate of 1:10 or even 1:12, with a sampling rate of 44kHz, The bit rate is 112kbit/s.
MP3 music is music stored in digital form. If it is to be played, it must have a corresponding digital decoding and playback system. Generally, special software is used to decode MP3 digital music and then restore it to a waveform sound signal for playback. output, this software is called an MP3 player, such as Winamp, etc.
Online Dominant RA Series
RA, RAM and RM are all mature network audio formats of Real Company. They adopt "audio streaming" technology, so they are very suitable for network broadcasting. Information such as copyright, singer, producer, Mail, and title of the song can be added during production.
RA can be called the overlord of multimedia communication on the Internet. It is suitable for real-time playback on the Internet and is currently the best format for listening to online music online.
High compression ratio VQF
VQF or TwinVQ is an audio compression technology developed by Nippon Telegraph and Telephone and YAMAHA.
The audio compression rate of VQF is nearly twice that of the standard MPEG audio compression rate, and can reach about 1:18 or even higher. However, popular compression formats such as MP3 and RA are generally only about 1:12. But it still does not affect the sound quality. When VQF compresses music at an audio sampling rate of 44kHz-80kbit/s, its sound quality will be better than MP3 at 44kHz-128kbit/s. When compressed at 44kHz-96kbit/s, the music is close to 44kHz- 256kbit/s MP3.
Mini Disc MD
MD (MiniDisc) is a complete portable music format launched by SONY in 1992. The compression algorithm it uses is ATRAC technology (compression ratio is 1:5). MD is divided into recordable MD (recordable, with two heads: magnetic head and laser head) and single-playback MD (Pre-recorded, only laser head).
Powerful editing functions are the strong point of MD. It can quickly select songs, move tracks, merge, split, delete and edit song titles and many other functions. It is more personalized than CD, and you can have a copy of your own at any time. My own MD album. MD's products include MD Walkman, MD bedside audio, MD car audio, MD recording deck, MD camera gun and MD driver, etc.
Music CD
It is a CD record. A CD can play about 74 minutes of sound files. Windows system comes with a CD player, and most of the software that comes with the sound card All provide CD playback functions, and some even have optical drives that are detached from the computer and can be used as an independent CD player as long as the power is connected.
WMA with unlimited potential
Microsoft mainly promotes ASF (Audio Steaming format) in developing its own network multimedia service platform, which is an open support for a variety of networks and protocols. standards for data transmission. It supports audio, video, and a range of other multimedia types. WMA is the abbreviation of Windows Media Audio, which is equivalent to an ASF file containing only audio.
The compression ratio of WMA files in 80kbps, 44kHz mode can reach 1:18, which is basically the same as VQF. And the compression speed is doubled compared to MP3. So it should be more competitive than VQF.
Free music format Vorbis
In order to prevent the increase in patent fees charged by MP3 music companies, programmers from GMGI's iCast company developed a new free music format Vorbis, whose sound quality can Comparable to, or even better than, MP3. And it will be released through the Internet and can be downloaded for free without worrying about infringement issues. However, MP3 has become very popular on the Internet, and Microsoft's Windows Media technology has begun to become popular. Vorbis's prospects are still not optimistic.
Other audio formats
AIF/AIFF: A sound file format developed by Apple, supports MAC platform, and supports 16-bit 44.1kHz stereo.
AU: SUN's AU compressed sound file format only supports 8-bit sound. It is a commonly used sound file format on the Internet and is mostly created by SUN workstations.
CDA: CD audio track file.
CMF: A MIDI-like sound file developed by CREATIVE.
DSP: Abbreviation for Digital Signal Processing. By improving the signal processing methods, the sound quality will be greatly improved and the songs will be more pleasant to listen to.
S3U: MP3 playback file list
RMI: MIDI instrument sequence
Lossy compression:
AAC: at high bitrates The sound quality is second only to MPC, and the performance is very good at high and low bit rates. The encoding speed is too slow!
MPC: The performance at low bit rates is average, not as good as MP3 and OGG encoded by Mp3Pro. The sound quality is best at high bit rates and the encoding speed is fast!
OGG : The sound quality is best at low bit rates, but high bit rates are also good. Encoding is slightly slower.
MP3 (MP3Pro): The sound quality is inferior to OGG at low bit rates, and the same as MP3 in other aspects.
WMA: Average at both high and low bit rates, does not support VBR, up to 192Kbit/s
Lossless compression:
FLAC: The compression rate is the worst among the four, the encoding speed is good, and the platform support is very good.
PAC: Slightly slower encoding speed, third highest compression rate, and good platform support.
APE: The fastest encoding speed, the best compression rate, and average platform support.
WV: The encoding speed is very fast, the compression rate ranks second among the four types, and it only supports Windows platforms