Can be played.
Audio formats and differences:
1. MP3 format 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 files with a smaller capacity at 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. Supplement: The maximum bit rate is 320K, and its shortcoming is that the high frequency part is one-size-fits-all. The sound quality is not high! 2. WMA format The full name of WMA is Windows Media Audio, which is an audio format strongly promoted by Microsoft. The WMA format achieves a higher compression rate by reducing data traffic but maintaining sound quality. Its compression rate can generally reach 1:18, and the generated file size is only half of the corresponding MP3 file. This is very important for models that are only equipped with 32M. It supports WMA and RA formats, which means that the 32M space has been expanded by two times. In addition, WMA can also prevent copying through DRM (Digital Rights Management) solutions, or add restrictions on playback time and playback times, or even restrictions on playback machines, which can effectively prevent piracy. Supplement: 128kbps is the optimal compression ratio of wma, 128kbps wma=192kbps mp33, WAV format. 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 used by Windows platforms and their applications. The program is widely supported. 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. Supplement: Lossless format, disadvantage: very large size! 4. ASF format The full name of ASF is Advanced Streaming Format. It is a media playback format developed by Microsoft and is suitable for playback on the network. Windows Media On-Demand Producer is a free software for creating ASF files, allowing even beginners to easily create ASF files using ready-made WAV or AVI files. Supplement: Rare format 5. AAC format AAC is actually the abbreviation of Advanced Audio Coding. AAC is an audio format jointly developed by Fraunhofer IIS-A, Dolby and AT&T. It is part of the MPEG-2 specification. The algorithm used by AAC is different from that of MP3. AAC improves encoding efficiency by combining other functions. AAC's audio algorithm far exceeds some previous compression algorithms (such as MP3, etc.) in terms of compression capabilities. It also supports up to 48 audio tracks, 15 low-frequency audio tracks, more sampling rates and bit rates, multiple language compatibility, and higher decoding efficiency. In short, AAC can provide better sound quality while reducing the size of MP3 files by 30%. Supplement: One of the best lossy formats out there. There are many encodings, faac and nero are common, with the highest bit rate 448kbps. In terms of hardware support, advanced MP3 and modern mobile phones are generally supported. 6. Mp3Pro format Mp3Pro is an upgraded version of the Mp3 encoding format. MP3Pro was developed by the Swedish Coding Technology Company. It can also compress the file size of sound files to half the size of the original MP3 format while maintaining the same sound quality.
And it can improve the original MP3 music sound quality without basically changing the file size. It can compress audio files at a lower bit rate while maintaining the pre-compression sound quality to the greatest extent. MP3pro can achieve complete compatibility. For files compressed by mp3Pro, the extension is still .mp3. Can be played on older mp3 players. Old mp3 files can be played on the new mp3pro player. It achieves what the company calls "forward and backward compatibility." Supplement: The compressed format of mp3 can be thought of as 7. VQF format. The VQF format is an audio compression technology jointly developed by YAMAHA and NTT***. Its compression rate can reach 1:18, so under the same circumstances, after compression The file size of VQF is 30% to 50% smaller than MP3, making it easier to spread online. At the same time, the sound quality is excellent, close to CD sound quality (16-bit 44.1kHz stereo). However, VQF has not disclosed technical standards and has not yet become popular. Supplement: Rare 8. FLAC format FLAC is the abbreviation of Free Lossless Audio Codec, which can be interpreted as lossless audio compression coding in Chinese. FLAC is a well-known set of free audio compression codes, which is characterized by lossless compression. Unlike other lossy compression codes such as MP3 and AAC, it does not destroy any original audio information, so it can restore the sound quality of music CDs. It is now supported by many software and hardware audio products. In short, FLAC is similar to MP3, but it is lossless compression, which means that audio will not lose any information when compressed in FLAC. This compression method is similar to Zip, but FLAC will give you a larger compression ratio, because FLAC is a compression method specially designed for the characteristics of audio, and you can use the player to play FLAC compressed files just like you normally play them. Same as MP3 files. Supplement: It is a lossless format. Compared with ape, it is larger in size, but has good compatibility, fast encoding speed, and wider player support. 9. APE format APE is one of the currently popular digital music file formats. Different from lossy compression methods such as MP3, APE is a lossless compression audio technology, which means that after you compress the audio data files read from the audio CD into APE format, you can also compress the APE format files Restore, and the restored audio file is exactly the same as before compression without any loss. The file size of APE is about half that of CD, but with the popularity of broadband, the APE format has become popular among many music lovers. Especially for friends who want to transfer audio CDs through the network, APE can help them save a lot of resources. . Supplement: It is a lossless compression format, which is smaller than flac. Encoding speed is slow. 10.MID format MID is the abbreviation of midi and its extension. MIDI is the abbreviation of Music Instrument Digital Interface in English, which translates as "digital musical instrument interface", which means that its true meaning is the name of an interface for signal transmission by different devices. Our current MIDI music production all relies on this interface, and the information transmitted between this interface is also called MIDI information. MIDI was first applied to electronic synthesizers, an electronic musical instrument played with a keyboard. Due to the inconsistent technical specifications of early electronic synthesizers, it was difficult to link different synthesizers. In August 1983, YAMAHA and ROLAND Well-known electronic musical instrument manufacturers such as , KAWAI and others jointly specified a unified digital musical instrument interface specification, which is the MIDI1.0 technical specification. Since then, various electronic synthesizers, electronic keyboards and other electronic musical instruments have adopted this unified specification. In this way, various electronic musical instruments can be linked to each other to convey MIDI information and form a true synthetic music performance system. Due to the rapid development of multimedia computer technology and the powerful processing capabilities of computers for digital signals, it is natural for computers to process MIDI information. Therefore, many people now call MIDI music computer music. In fact, using multimedia computers can not only play, create and perform MIDI music in real time. You can even convert MIDI music into visible musical notation (staff or simplified notation) and print it out, and conversely, you can also turn the musical notation into beautiful music.
Using this property of MIDI, it can be used in music teaching (especially music reading), allowing students to use computers to learn music knowledge and create music. 11. OGG format The full name of Ogg should be OGG Vobis (ogg Vorbis). It is a new audio compression format, similar to existing music formats such as MP3. But one thing is different: it is completely free, open and patent-free. OGG Vobis has a very outstanding feature, that is, it supports multi-channel. With its popularity, it will not be a dream to use a Walkman to listen to DTS-encoded multi-channel works in the future. Vorbis is the name of this audio compression mechanism, and Ogg is the name of a project that intends to design a completely open multimedia system. Currently, only the OggVorbis part of the plan has been implemented. The extension for Ogg Vorbis files is .OGG. The design format of this file is very advanced. OGG files created now can be played on any player in the future, so the file format can continue to improve in size and sound quality without affecting older encoders or players. Supplement: Currently one of the best lossy formats, MP3 is partially supported, and the software installed on smartphones can partially support it. The highest bit rate is 500kbps. Summary: Common formats for music lovers include flac ape wav mp3 aac ogg wma. The compression ratio is: aac>ogg>mp3(wma)>ape>flac>wav (same sound quality) mp3 and wma use 192kbps as the dividing line, and mp3 above 192kbps OK, the following wma is good. Highest sound quality: wav=flac=ape>aac>ogg>mp3>wma (generally downloaded from online music websites, not downloaded casually from Baidu Sogou) wav=flac=ape=wma>aac>ogg>mp3 Among them, wma (lossless, but rare) ) wav rare hardware support: MP3 player mp3>wma>wav>flac>ape aac ogg mobile phone mp3>wma>aac wav>flac ogg>ape performance (that is, comprehensive sound quality volume encoding rate): aac>ogg>flac ape> mp3>wav wma (This is my personal opinion!)
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1. WMA Since it is a work of Microsoft, it must not be underestimated. WMA is like a shot in the arm that promotes the great progress of streaming media formats. WMA files can provide audible sound quality at a traffic of only 20K Bitrate, so WMA is often used as the first choice for online listening and broadcasting. Microsoft has long provided playback support in Windows Media Player. When the bitrate of WMA rises to 128k, it outperforms almost all lossy encoding formats at the same level. When MP3 has a bitrate of 128K, there will be obvious high-frequency loss, but WMA does not. But it seems that 128k is a threshold for WMA. When the bitrate is increased further, there will not be much change in sound quality. MP3 is different. At 192K, the sound quality can be better than WMA. When Microsoft launched WMA encoding, it had two main targets. One was targeting RM and RAM formats on the network, and the other was MP3 in users' hard drives. However, under the requirement of high sound quality, WMA still cannot pose a threat to MP3. If you want to get a compression ratio of about 12:1 or higher, you might as well choose the WMA format. Under this traffic, WMA is much better. The advantages and disadvantages of WMA and MP3 have always been the focus of debate. In fact, this is an unanswerable question. It depends on your actual needs, whether you are pursuing high sound quality (mp3) or high compression rate (wma). 2. VQF Before WMA became popular, VQF was a very popular format because its sound quality was better than MP3 (slightly worse than WMA) at low bit rates.
Not supporting "streaming" is VQF's Achilles' heel, which may be one of the main reasons why it is now completely suppressed by WMA. 3. MP3 The most controversial issue with MP3 is its sound quality (especially with the popularity of WMA). Its high-frequency loss is very large. The rough encoding algorithm of many MP3 encoders not only results in the loss of high-frequency, but also the loss of many details, similar to that of a guitar. The feeling of string scratching cannot be found in MP3. When I was almost disappointed with MP3, I accidentally discovered Lame, which supports waveform analysis based on the principle of human ear masking effect. With VBR technology, the sound quality can reach astonishing levels; its original psychological sound model technology ensures CD audio restoration. authenticity, combined with VBR (dynamic bit rate) and ABR (average bit rate) parameters, the encoded MP3 sound is pure and thick, the space is wide, the bass is clear, and the details are good. The sound quality is almost comparable to CD audio, but the file size is very Small. The reaction of many netizens after using LAME is: immediately delete all MP3 and other encoders on the hard drive and use Lame to process them all again. Lame provides EXE and DLL, where DLL is used as a standard dynamic runtime library for other programs to call. EXE is a Command Line program that works like a DOS program. The two are independent of each other and not related to each other. But everyone will soon find that the encoding quality of the two is different. This is due to the poor controllability of the dll. Compared with the EXE version with rich adjustment parameters, its compressed MP3 effect is slightly inferior. But EXE is a command line tool, and its operation is very troublesome. Fortunately, there are Shells such as WinLAMer or lameGUIxp. As long as you learn to use these Shells (it's a fool-proof one, you can do it at a glance), you can use LAME to compress the most exciting MP3s. Let’s talk about APS. Before LAME appeared, APS was the best MP3 encoder. It used the Fraunhofer IIS encoding algorithm, which was more advanced than the encoding algorithm used by LAME. At 192k Bitrate (CBR), it was even better than LAME encoded music. To be excellent, the details are obviously richer, but APS itself does not support VBR. When the bitrate is increased, the sound quality will be worse than that encoded by LAME. Most of my friends’ MP3s are generally 128-192K bitrate, so APS still has recommended value. In particular, there are many MP3 players that do not support VBR and MP3 with a bitrate of 256K or above. LAME may not be suitable for these friends. APS is a good choice. The songs encoded by it will definitely not insult your expensive PLAYER. 4. MP3PRO MP3PRO is completely based on an improvement of traditional MP3 encoding technology. Its biggest technical highlight is SBR (Spectral Band Replication), which is a new audio coding enhancement algorithm. It provides the possibility to improve the performance of audio and speech coding at low bit rates. This method can increase the bandwidth of audio or improve encoding efficiency at a specified bit rate. The biggest advantage of SBR is to achieve very efficient encoding at low data rates. At high data rates, SBR will act as if it were disabled. When making MP3PRO files, the encoder splits the audio into two parts. Part of it is to separate the low-frequency part of the audio data and encode it through traditional MP3 technology to obtain a normal MP3 audio stream. This allows the MP3 encoder to focus on the low-frequency signal to obtain better compression quality. , and the original MP3 player can also play MP3PRO files. The other part is to encode the separated high-frequency signal and embed it into the MP3 stream. Traditional MP3 players will ignore it, while the new MP3PRO player can restore the high-frequency signal and combine the two. Combine for high-quality, full-bandwidth sound. Officials claim that through this technology, MP3PRO can provide the same quality as 128kbps MP3 at a 64kbps encoding rate. The performance of MP3PRO at low bit rates is obviously higher than that of MP3, but it is difficult to say who wins between it and WMA. According to the evaluation of some enthusiasts, MP3PRO seems to be slightly better. MP3PRO is rarely used at high bit rates.
5. OGG Under the requirement of high sound quality, there are three pillars in the world of lossy audio coding, namely MP3, MPC and OGG. Supported by a large number of new technologies, these codes have excellent performance and each has a group of supporters. At higher bit rates, the quality displayed by OGG is very commendable, but OGG also has a big shortcoming, which is the metallic taste of high frequencies, which is somewhat disappointing. 6. MPC: At higher bit rates (around 250kbps), MPC performs very well, even surpassing MP3. It is difficult to tell the difference between it and the original signal, whether in terms of frequency preservation, detail preservation, or signal strength distortion. MPC is great. But MPC is not omnipotent. It cannot encode music with a 48khz sampling rate. Fortunately, there are few sources of such music. It's a pity that this format is not as popular as MP3 or WMA. 7. ATRAC: MD uses ATRAC (Adaptive TRansform Acoustic Coding) compression algorithm. ATRAC currently only supports MD. ATRAC also has a derivative algorithm ATRAC3. OpenMG Jukebox uses this encoding. The encoded file extension It's called OMG. It integrates encoding, tracking, playback, management and output. It is relatively large but easy to operate. It uses the human ear masking principle to effectively filter sound signals that are insensitive to the human ear to achieve a higher compression ratio. Unlike ATRAC, ATRAC3 supports different average data rates, with 132, 105, and 66Kbits available. This software can provide direct output to some MD models that support MDLP, which can save a lot of recording time. This software has strict copyright protection on files and cannot be freely copied and backed up like MP3. If you have an MD that supports MDLP, you might as well give this software a try. 8. APE Different from the encodings introduced above, this encoding provides the best sound quality guarantee (lossless compression)! Winamp plug-in support is also provided, and Winamp can be used to play directly. The so-called lossless means that there is no difference in sound quality between the compressed format and the source file. The encoding schemes of MP3, WMA, etc. are based on lossy, which saves storage space without losing part of the sound quality, so no matter how good the sound quality is Mp3 and WMA can only be infinitely close to the sound quality of the source file. APE is ideal for encoding detailed solo pieces and dynamic symphonies. I give my strongest recommendation to all music fans (not fans)! Its compression ratio is about 2:1. 9. WAV It is an uncompressed format. It seems needless to say that before APE became popular, WAV has always been the first choice for sound quality perfectionists. Even now, if you want to make high-quality music, WAV cannot be replaced. An intermediate (because EAC, the most accurate track-ripping software currently recognized, obtains music directly from CD in WAV format). 10. RM RM is already a thing of the past and has no new ideas. The low bitrate cannot match WMA, and the high bitrate cannot match MP3. Although the new RM has introduced the ATRAC3 algorithm, the decline has been determined and it is difficult to make a comeback