Simplified Chinese characters
Simplified Chinese characters are standardized Chinese characters prescribed in the Table of General Standard Chinese Characters for use in mainland China. Along with traditional Chinese characters, they are one of the two standard character sets of the contemporary Chinese written language; the government of the People's Republic of China in mainland China has promoted them for use in printing since the 1950s and 1960s to encourage literacy. They are used in the People's Republic of China and Singapore. Traditional Chinese characters are used in Hong Kong and the Republic of China. While traditional characters can still be read and understood by many mainland Chinese and the Chinese community in Malaysia and Singapore, these groups retain their use of simplified characters. Overseas Chinese communities tend to use traditional characters. Simplified Chinese characters may be referred to by their official name colloquially; the latter refers to simplifications of character "structure" or "body", character forms that have existed for thousands of years alongside regular, more complicated forms.
On the other hand, the official name refers to the modern systematically simplified character set, which includes not only structural simplification but substantial reduction in the total number of standardized Chinese characters. Simplified character forms were created by reducing the number of strokes and simplifying the forms of a sizable proportion of Chinese characters; some simplifications were based on popular cursive forms embodying graphic or phonetic simplifications of the traditional forms. Some characters were simplified by applying regular rules, for example, by replacing all occurrences of a certain component with a simplified version of the component. Variant characters with the same pronunciation and identical meaning were reduced to a single standardized character the simplest amongst all variants in form. Many characters were left untouched by simplification, are thus identical between the traditional and simplified Chinese orthographies; some simplified characters are dissimilar to and unpredictably different from traditional characters in those where a component is replaced by a simple symbol.
This has led some opponents of simplification to complain that the'overall process' of character simplification is arbitrary. Proponents counter that the system of simplification is internally consistent. Proponents have emphasized a some particular simplified characters as innovative and useful improvements, although many of these have existed for centuries as longstanding and widespread variants. A second round of simplifications was promulgated in 1977, but was retracted in 1986 for a variety of reasons due to the confusion caused and the unpopularity of the second round simplifications. However, the Chinese government never dropped its goal of further simplification in the future. In August 2009, the PRC began collecting public comments for a modified list of simplified characters; the new Table of General Standard Chinese Characters consisting of 8,105 characters was implemented for use by the State Council of the People's Republic of China on June 5, 2013. Although most of the simplified Chinese characters in use today are the result of the works moderated by the government of the People's Republic of China in the 1950s and 60s, character simplification predates the PRC's formation in 1949.
Cursive written text always includes character simplification. Simplified forms used in print are attested as early as the Qin dynasty. One of the earliest proponents of character simplification was Lufei Kui, who proposed in 1909 that simplified characters should be used in education. In the years following the May Fourth Movement in 1919, many anti-imperialist Chinese intellectuals sought ways to modernise China. Traditional culture and values such as Confucianism were challenged. Soon, people in the Movement started to cite the traditional Chinese writing system as an obstacle in modernising China and therefore proposed that a reform be initiated, it was suggested that the Chinese writing system should be either simplified or abolished. Lu Xun, a renowned Chinese author in the 20th century, stated that, "If Chinese characters are not destroyed China will die". Recent commentators have claimed that Chinese characters were blamed for the economic problems in China during that time. In the 1930s and 1940s, discussions on character simplification took place within the Kuomintang government, a large number of Chinese intellectuals and writers maintained that character simplification would help boost literacy in China.
In 1935, 324 simplified characters collected by Qian Xuantong were introduced as the table of first batch of simplified characters, but they were suspended in 1936. The PRC issued its first round of official character simplifications in two documents, the first in 1956 and the second in 1964. Within the PRC, further character simplification became associated with the leftists of the Cultural Revolution, culminating with the second-round simplified characters, which were promulgated in 1977. In part due to the shock and unease felt in the wake of the Cultural Revolution and Mao's death, the second-round of simplifications was poorly received. In 1986 the authorities retracted the second round completely. In the same year, the authorities promulgated a final list of simplifications, identical to the 1964 list except for six changes (including the restoration of three characters, simplified in the First Round: 叠, 覆, 像.
Xi'an is the capital of Shaanxi Province, China. A sub-provincial city on the Guanzhong Plain in northwestern China, it is one of the oldest cities in China, the oldest of the Four Great Ancient Capitals, having held the position under several of the most important dynasties in Chinese history, including Western Zhou, Western Han and Tang. Xi'an is the starting point of the Silk Road and home to the Terracotta Army of Emperor Qin Shi Huang. Since the 1990s, as part of the economic revival of inland China for the central and northwest regions, the city of Xi'an has re-emerged as an important cultural and educational centre of the central-northwest region, with facilities for research and development, national security and space exploration. Xi'an holds sub-provincial status, administering 9 districts and 4 counties; as of 2018 Xi'an has a population of 12,005,600, the Xi'an–Xianyang metropolitan area a population of 12.9 million. It is the most populous city in Northwest China, as well as one of the three most populous cities in Western China, the other two are Chongqing and Chengdu.
In 2012, it megalopolises, in China. "Xi'an" is the atonal pinyin romanization of the Mandarin pronunciation of its name 西安, which means "Western Peace". The name was adopted in 1369 under the early Ming dynasty. Jesuit missionaries recorded its name as "Si-ngan" or "Si-ngan-fou" from its status as the seat of a prefecture; this form still appears in the Latin name of the Catholic diocese of Xi'an, archidioecesis Singanensis. The name was romanized as "Hsi-an" by Wade & Giles and as "Sianfu" or "Sian" by the Qing imperial post office, both of which were common until the general adoption of pinyin; the area of present-day Xi'an has been the site of several important former Chinese cities. The capital of the Western Zhou were the twin cities of Feng and Hao, known collectively as Fenghao, located on opposite banks of the Feng River at its confluence with the southern bank of the Wei in the western suburbs of present-day Xi'an; the Qin capital Xianyang was erected north of the Wei during the Warring States period and was succeeded by the Western Han capital of Chang'an, meaning "Perpetual Peace", located south of the Wei and covered the central area of present-day Xi'an.
During the Eastern Han, Chang'an was known as Xijing or the "Western Capital", relative to its position to the main capital at Luoyang. Under the Sui, its name became Daxing in AD 581. Under the Tang, the name reverted to Chang'an in 618. Under the Mongolian Yuan dynasty, it held a succession of names: Fengyuan and Jingzhao; the Ming name "Xi'an" was changed back to Xijing between 1930 and 1943. Xi'an does not have a accepted one-character abbreviation as many other Chinese cities do, its license plates are marked with 陕A, based on the name of its province. Xi'an has a culturally significant history; the Lantian Man was discovered in 1963 in Lantian County, 50 km southeast of Xi'an, dates back to at least 500,000 years before the present time. A 6,500-year-old Neolithic village, was discovered in 1953 on the eastern outskirts of the city proper, which contains the remains of several well organized Neolithic settlements carbon dated to 5600–6700 years ago; the site is now home to the Xi'an Banpo Museum, built in 1957 to preserve the archaeological collection.
Xi'an became a cultural and political centre of China in the 11th century BC with the founding of the Zhou dynasty. The capital of Zhou was established in the twin settlements of Fengjing and Haojing, together known as Fenghao, located southwest of contemporary Xi'an; the settlement was known as Zhōngzhōu to indicate its role as the capital of the vassal states. In 770 BC, the capital was moved to Luoyang due to political unrest. Following the Warring States period, China was unified under the Qin dynasty for the first time, with the capital located at Xianyang, just northwest of modern Xi'an; the first emperor of China, Qin Shi Huang ordered the construction of the Terracotta Army and his mausoleum just to the east of Xi'an immediately after his ascension to the throne. In 202 BC, the founding emperor Liu Bang of the Han dynasty established his capital in Chang'an County; this is traditionally regarded as the founding date of Chang'an. Two years Liu Bang built Weiyang Palace north of modern Xi'an.
Weiyang Palace was the largest palace built on Earth, covering 4.8 square kilometres, 6.7 times the size of the current Forbidden City and 11 times the size of the Vatican City. The original Xi'an city wall took 4 years to finish. Upon completion, the wall measured 25.7 km in length and 12 to 16 m in thickness at the base, enclosing an area of 36 km2. In the year 190, amidst uprisings and rebellions just prior to the Three Kingdoms Period, a powerful warlord named Dong Zhuo moved the court from Luoyang to Chang'an in a bid to avoid a coalition of other powerful warlords against him. Following several hundred years of unrest, the Sui dynasty united China again in 582; the emperor of Sui ordered a new capital to be built southeast of the Han capital, called Daxing. It consisted of three sections: the Imperial City, the palace section, the civilian section, with a total
People's Liberation Army
The Chinese People's Liberation Army is the armed forces of the People's Republic of China and its founding and ruling political party, the Communist Party of China. The PLA consists of five professional service branches: the Ground Force, Air Force, Rocket Force, the Strategic Support Force. Units around the country are assigned to one of five theater commands by geographical location; the PLA is the world's largest military force and constitutes the second largest defence budget in the world. It is one of the fastest modernising military powers in the world and has been termed as a potential military superpower, with significant regional defense and rising global power projection capabilities. China is the third largest arms exporter in the world; the PLA is under the command of the Central Military Commission of the CPC. It is obliged to follow the principle of civilian control of the military, although in practical terms this principle has been implemented in such a way as to ensure the PLA is under the absolute control of the Communist Party.
Its commander in chief is the Chairman of the Central Military Commission. The Ministry of National Defense, which operates under the State Council, does not exercise any authority over the PLA and is far less powerful than the CMC. Military service is compulsory by law. In times of national emergency, the People's Armed Police and the People's Liberation Army militia act as a reserve and support element for the PLAGF. Former CMC chairman Hu Jintao had defined the missions of the PLA as: To consolidate the ruling status of the Communist Party To ensure China's sovereignty, territorial integrity, domestic security to continue national development To safeguard China's national interests To help maintain world peace The People's Liberation Army was founded on 1 August 1927 during the Nanchang uprising when troops of the Kuomintang rebelled under the leadership of Zhu De, He Long, Ye Jianying and Zhou Enlai after the massacre of the Communists by Chiang Kai-shek, they were known as the Chinese Workers' and Peasants' Red Army, or the Red Army.
Between 1934 and 1935, the Red Army survived several campaigns led against it by Chiang Kai-Shek and engaged in the Long March. During the Second Sino-Japanese War from 1937 to 1945, the Communist military forces were nominally integrated into the National Revolutionary Army of the Republic of China forming two main units known as the Eighth Route Army and the New Fourth Army. During this time, these two military groups employed guerrilla tactics avoiding large-scale battles with the Japanese with some exceptions while at the same time consolidating their ground by absorbing nationalist troops and paramilitary forces behind Japanese lines into their forces. After the Japanese surrendered in 1945, the Communist Party merged the Eighth Route Army and New Fourth Army, renaming the new million-strong force the "People's Liberation Army", they won the Chinese Civil War, establishing the People's Republic of China in 1949. The PLA saw a huge reorganisation with the establishment of the Air Force leadership structure in November 1949 followed by the Navy leadership the following April.
In 1950, the leadership structures of the artillery, armoured troops, air defence troops, public security forces, worker–soldier militias were established. The chemical warfare defence forces, the railroad forces, the communications forces, the strategic forces, as well as other separate forces, were established on, all these depended on the leadership of the Communist Party and the National People's Congress via the Central Military Commission. During the 1950s, the PLA with Soviet assistance began to transform itself from a peasant army into a modern one. Part of this process was the reorganisation that created thirteen military regions in 1955; the PLA contained many former National Revolutionary Army units and generals who had defected to the PLA. Ma Hongbin and his son Ma Dunjing were the only two Muslim generals who led a Muslim unit, the 81st corps, to serve in the PLA. Han Youwen, a Salar Muslim general defected to the PLA. In November 1950, some units of the PLA under the name of the People's Volunteer Army intervened in the Korean War as United Nations forces under General Douglas MacArthur approached the Yalu River.
Under the weight of this offensive, Chinese forces drove MacArthur's forces out of North Korea and captured Seoul, but were subsequently pushed back south of Pyongyang north of the 38th Parallel. The war served as a catalyst for the rapid modernization of the PLAAF. In 1962, the PLA ground force fought India in the Sino-Indian War, achieving all objectives. Prior to the Cultural Revolution, military region commanders tended to remain in their posts for long periods of time; as the PLA took a stronger role in politics, this began to be seen as somewhat of a threat to the party's control of the military. The longest-serving military region commanders were Xu Shiyou in the Nanjing Military Region, Yang Dezhi in the Jinan Military Region, Chen Xilian in the Shenyang Military Region, Han Xianchu in the Fuzhou Military Region; the establishment of a professional military force equipped with modern weapons and doctrine was the last of the Four Modernizations announced by Zhou Enlai and supported by Deng Xiaoping.
In keeping with Deng's mandate to reform, the PLA has demobilized millions o
The guitar is a fretted musical instrument that has six strings. It is played with both hands by strumming or plucking the strings with either a guitar pick or the finger/fingernails of one hand, while fretting with the fingers of the other hand; the sound of the vibrating strings is projected either acoustically, by means of the hollow chamber of the guitar, or through an electrical amplifier and a speaker. The guitar is a type of chordophone, traditionally constructed from wood and strung with either gut, nylon or steel strings and distinguished from other chordophones by its construction and tuning; the modern guitar was preceded by the gittern, the vihuela, the four-course Renaissance guitar, the five-course baroque guitar, all of which contributed to the development of the modern six-string instrument. There are three main types of modern acoustic guitar: the classical guitar, the steel-string acoustic guitar, the archtop guitar, sometimes called a "jazz guitar"; the tone of an acoustic guitar is produced by the strings' vibration, amplified by the hollow body of the guitar, which acts as a resonating chamber.
The classical guitar is played as a solo instrument using a comprehensive finger-picking technique where each string is plucked individually by the player's fingers, as opposed to being strummed. The term "finger-picking" can refer to a specific tradition of folk, blues and country guitar playing in the United States; the acoustic bass guitar is a low-pitched instrument, one octave below a regular guitar. Electric guitars, introduced in the 1930s, use an amplifier and a loudspeaker that both makes the sound of the instrument loud enough for the performers and audience to hear, given that it produces an electric signal when played, that can electronically manipulate and shape the tone using an equalizer and a huge variety of electronic effects units, the most used ones being distortion and reverb. Early amplified guitars employed a hollow body, but solid wood guitars began to dominate during the 1960s and 1970s, as they are less prone to unwanted acoustic feedback "howls"; as with acoustic guitars, there are a number of types of electric guitars, including hollowbody guitars, archtop guitars and solid-body guitars, which are used in rock music.
The loud, amplified sound and sonic power of the electric guitar played through a guitar amp has played a key role in the development of blues and rock music, both as an accompaniment instrument and performing guitar solos, in many rock subgenres, notably heavy metal music and punk rock. The electric guitar has had a major influence on popular culture; the guitar is used in a wide variety of musical genres worldwide. It is recognized as a primary instrument in genres such as blues, country, folk, jota, metal, reggae, rock and many forms of pop. Before the development of the electric guitar and the use of synthetic materials, a guitar was defined as being an instrument having "a long, fretted neck, flat wooden soundboard, a flat back, most with incurved sides." The term is used to refer to a number of chordophones that were developed and used across Europe, beginning in the 12th century and in the Americas. A 3,300-year-old stone carving of a Hittite bard playing a stringed instrument is the oldest iconographic representation of a chordophone and clay plaques from Babylonia show people playing an instrument that has a strong resemblance to the guitar, indicating a possible Babylonian origin for the guitar.
The modern word guitar, its antecedents, has been applied to a wide variety of chordophones since classical times and as such causes confusion. The English word guitar, the German Gitarre, the French guitare were all adopted from the Spanish guitarra, which comes from the Andalusian Arabic قيثارة and the Latin cithara, which in turn came from the Ancient Greek κιθάρα. Which comes from the Persian word "sihtar"; this pattern of naming is visible in setar and sitar. The word "tar" at the end of all of these words is a Persian word that means "string". Many influences are cited as antecedents to the modern guitar. Although the development of the earliest "guitars" is lost in the history of medieval Spain, two instruments are cited as their most influential predecessors, the European lute and its cousin, the four-string oud. At least two instruments called "guitars" were in use in Spain by 1200: the guitarra latina and the so-called guitarra morisca; the guitarra morisca had a rounded back, wide fingerboard, several sound holes.
The guitarra Latina had a narrower neck. By the 14th century the qualifiers "moresca" or "morisca" and "latina" had been dropped, these two cordophones were referred to as guitars; the Spanish vihuela, called in Italian the "viola da mano", a guitar-like instrument of the 15th and 16th centuries, is considered to have been the single most important influence in the development of the baroque guitar. It had six courses, lute-like tuning in fourths and a guitar-like body, although early representations reveal an instrument with a cut waist, it was larger than the contemporary four-course guitars. By the 16th century, the vihuela's construction had more in common with the modern guitar, with its curved one-piece ribs, than with the viols, more like a larger version of the contemporary four-course guita
A secondary school is both an organization that provides secondary education and the building where this takes place. Some secondary schools can provide both lower secondary education and upper secondary education, but these can be provided in separate schools, as in the American middle and high school system. Secondary schools follow on from primary schools and lead into vocational and tertiary education. Attendance is compulsory in most countries for students between the ages of 11 and 16; the organisations and terminology are more or less unique in each country. Within the English speaking world, there are three used systems to describe the age of the child; the first is the'equivalent ages' countries that base their education systems on the'English model' use one of two methods to identify the year group, while countries that base their systems on the'American K-12 model' refer to their year groups as'grades'. This terminology extends into research literature. Below is a convenient comparison.
The building needs to accommodate: Curriculum content Teaching methods Costs Education within the political framework Use of school building Constraints imposed by the site Design philosophyEach country will have a different education system and priorities. Schools need to accommodate students, storage and electrical systems, support staff, ancillary staff and administration; the number of rooms required can be determined from the predicted roll of the school and the area needed. According to standards used in the United Kingdom, a general classroom for 30 students needs to be 55 m², or more generously 62 m². A general art room for 30 students needs to be 83 m ². A drama studio or a specialist science laboratory for 30 needs to be 90 m². Examples are given on, and 1,850 place secondary school. The building providing the education has to fulfil the needs of: The students, the teachers, the non-teaching support staff, the administrators and the community, it has to meet general government building guidelines, health requirements, minimal functional requirements for classrooms and showers, electricity and services and storage of textbooks and basic teaching aids.
An optimum secondary school will meet the minimum conditions and will have: adequately sized classrooms. Government accountants having read the advice publish minimum guidelines on schools; these enable environmental establishing building costs. Future design plans are audited to ensure. Government ministries continue to press for cost standards to be reduced; the UK government published this downwardly revised space formula in 2014. It said the floor area should be 1050m² + 6.3m²/pupil place for 11- to 16-year-olds + 7m²/pupil place for post-16s. The external finishes were to be downgraded to meet a build cost of £1113/m². A secondary school locally may be called high senior high school. In some countries there are two phases to secondary education and, here the junior high school, intermediate school, lower secondary school, or middle school occurs between the primary school and high school. Names for secondary schools by countryArgentina: secundaria or polimodal, escuela secundaria Australia: high school, secondary college Austria: Gymnasium, Hauptschule, Höhere Bundeslehranstalt, Höhere Technische Lehranstalt Azerbaijan: orta məktəb Bahamas, The: junior high, senior high Belgium: lagere school/école primaire, secundair onderwijs/école secondaire, humaniora/humanités Bolivia: educación primaria superior and educación secundaria and Herzegovina: srednja škola, gimnazija Brazil: ensino médio, segundo grau Brunei: sekolah menengah, a few maktab Bulgaria: cредно образование Canada: High school, junior high or middle school, secondary school, école secondaire, collegiate institute, polyvalente Chile: enseñanza media China: zhong xue, consisting of chu zhong from grades 7 to 9 and gao zhong from grades 10 to 12 Colombia: bachillerato, segunda enseñanza Croatia: srednja škola, gimnazija Cyprus: Γυμνάσιο, Ενιαίο Λύκειο Czech Republic: střední škola, gymnázium, střední odborné učiliště Denmark: gymnasium Dominican Republic: nivel medio, bachillerato Egypt: Thanawya Amma, Estonia: upper secondary school, Lyceum Finland: lukio gymnasium France: collège, lycée Germany: Gymnasium, Realschule, Fachoberschule Greece: Γυμνάσιο, Γενικό Λύκειο, Ενιαίο Λύκειο, Hong Kong: Secondary school Hungary: gimnázium, k
Rock music is a broad genre of popular music that originated as "rock and roll" in the United States in the early 1950s, developed into a range of different styles in the 1960s and particularly in the United Kingdom and in the United States. It has its roots in 1940s and 1950s rock and roll, a style which drew on the genres of blues and blues, from country music. Rock music drew on a number of other genres such as electric blues and folk, incorporated influences from jazz and other musical styles. Musically, rock has centered on the electric guitar as part of a rock group with electric bass and one or more singers. Rock is song-based music with a 4/4 time signature using a verse–chorus form, but the genre has become diverse. Like pop music, lyrics stress romantic love but address a wide variety of other themes that are social or political. By the late 1960s "classic rock" period, a number of distinct rock music subgenres had emerged, including hybrids like blues rock, folk rock, country rock, southern rock, raga rock, jazz-rock, many of which contributed to the development of psychedelic rock, influenced by the countercultural psychedelic and hippie scene.
New genres that emerged included progressive rock. In the second half of the 1970s, punk rock reacted by producing stripped-down, energetic social and political critiques. Punk was an influence in the 1980s on new wave, post-punk and alternative rock. From the 1990s alternative rock began to dominate rock music and break into the mainstream in the form of grunge and indie rock. Further fusion subgenres have since emerged, including pop punk, electronic rock, rap rock, rap metal, as well as conscious attempts to revisit rock's history, including the garage rock/post-punk and techno-pop revivals at the beginning of the 2000s. Rock music has embodied and served as the vehicle for cultural and social movements, leading to major subcultures including mods and rockers in the UK and the hippie counterculture that spread out from San Francisco in the US in the 1960s. 1970s punk culture spawned the goth and emo subcultures. Inheriting the folk tradition of the protest song, rock music has been associated with political activism as well as changes in social attitudes to race and drug use, is seen as an expression of youth revolt against adult consumerism and conformity.
The sound of rock is traditionally centered on the amplified electric guitar, which emerged in its modern form in the 1950s with the popularity of rock and roll. It was influenced by the sounds of electric blues guitarists; the sound of an electric guitar in rock music is supported by an electric bass guitar, which pioneered in jazz music in the same era, percussion produced from a drum kit that combines drums and cymbals. This trio of instruments has been complemented by the inclusion of other instruments keyboards such as the piano, the Hammond organ, the synthesizer; the basic rock instrumentation was derived from the basic blues band instrumentation. A group of musicians performing rock music is termed as a rock group. Furthermore, it consists of between three and five members. Classically, a rock band takes the form of a quartet whose members cover one or more roles, including vocalist, lead guitarist, rhythm guitarist, bass guitarist and keyboard player or other instrumentalist. Rock music is traditionally built on a foundation of simple unsyncopated rhythms in a 4/4 meter, with a repetitive snare drum back beat on beats two and four.
Melodies originate from older musical modes such as the Dorian and Mixolydian, as well as major and minor modes. Harmonies range from the common triad to parallel perfect fourths and fifths and dissonant harmonic progressions. Since the late 1950s and from the mid 1960s onwards, rock music used the verse-chorus structure derived from blues and folk music, but there has been considerable variation from this model. Critics have stressed the eclecticism and stylistic diversity of rock; because of its complex history and its tendency to borrow from other musical and cultural forms, it has been argued that "it is impossible to bind rock music to a rigidly delineated musical definition." Unlike many earlier styles of popular music, rock lyrics have dealt with a wide range of themes, including romantic love, rebellion against "The Establishment", social concerns, life styles. These themes were inherited from a variety of sources such as the Tin Pan Alley pop tradition, folk music, rhythm and blues.
Music journalist Robert Christgau characterizes rock lyrics as a "cool medium" with simple diction and repeated refrains, asserts that rock's primary "function" "pertains to music, or, more noise." The predominance of white and middle class musicians in rock music has been noted, rock has been seen as an appropriation of black musical forms for a young and male audience. As a result, it has been seen to articulate the concerns of this group in both style and lyrics. Christgau, writing in 1972, said in spite of some exceptions, "rock and roll implies an identification of male sexuality and aggression". Since the term "rock" started being used in preference to "rock and roll" from the late-1960s, it has been contrasted with pop music, with which it has shared many characteristics, but from wh
MusicBrainz is a project that aims to create an open data music database, similar to the freedb project. MusicBrainz was founded in response to the restrictions placed on the Compact Disc Database, a database for software applications to look up audio CD information on the Internet. MusicBrainz has expanded its goals to reach beyond a compact disc metadata storehouse to become a structured open online database for music. MusicBrainz captures information about artists, their recorded works, the relationships between them. Recorded works entries capture at a minimum the album title, track titles, the length of each track; these entries are maintained by volunteer editors. Recorded works can store information about the release date and country, the CD ID, cover art, acoustic fingerprint, free-form annotation text and other metadata; as of 21 September 2018, MusicBrainz contained information about 1.4 million artists, 2 million releases, 19 million recordings. End-users can use software that communicates with MusicBrainz to add metadata tags to their digital media files, such as FLAC, MP3, Ogg Vorbis or AAC.
MusicBrainz allows contributors to upload cover art images of releases to the database. Internet Archive provides the bandwidth and legal protection for hosting the images, while MusicBrainz stores metadata and provides public access through the web and via an API for third parties to use; as with other contributions, the MusicBrainz community is in charge of maintaining and reviewing the data. Cover art is provided for items on sale at Amazon.com and some other online resources, but CAA is now preferred because it gives the community more control and flexibility for managing the images. Besides collecting metadata about music, MusicBrainz allows looking up recordings by their acoustic fingerprint. A separate application, such as MusicBrainz Picard, must be used for this. In 2000, MusicBrainz started using Relatable's patented TRM for acoustic fingerprint matching; this feature allowed the database to grow quickly. However, by 2005 TRM was showing scalability issues as the number of tracks in the database had reached into the millions.
This issue was resolved in May 2006 when MusicBrainz partnered with MusicIP, replacing TRM with MusicDNS. TRMs were phased out and replaced by MusicDNS in November 2008. In October 2009 MusicIP was acquired by AmpliFIND; some time after the acquisition, the MusicDNS service began having intermittent problems. Since the future of the free identification service was uncertain, a replacement for it was sought; the Chromaprint acoustic fingerprinting algorithm, the basis for AcoustID identification service, was started in February 2010 by a long-time MusicBrainz contributor Lukáš Lalinský. While AcoustID and Chromaprint are not MusicBrainz projects, they are tied with each other and both are open source. Chromaprint works by analyzing the first two minutes of a track, detecting the strength in each of 12 pitch classes, storing these 8 times per second. Additional post-processing is applied to compress this fingerprint while retaining patterns; the AcoustID search server searches from the database of fingerprints by similarity and returns the AcoustID identifier along with MusicBrainz recording identifiers if known.
Since 2003, MusicBrainz's core data are in the public domain, additional content, including moderation data, is placed under the Creative Commons CC-BY-NC-SA-2.0 license. The relational database management system is PostgreSQL; the server software is covered by the GNU General Public License. The MusicBrainz client software library, libmusicbrainz, is licensed under the GNU Lesser General Public License, which allows use of the code by proprietary software products. In December 2004, the MusicBrainz project was turned over to the MetaBrainz Foundation, a non-profit group, by its creator Robert Kaye. On 20 January 2006, the first commercial venture to use MusicBrainz data was the Barcelona, Spain-based Linkara in their Linkara Música service. On 28 June 2007, BBC announced that it has licensed MusicBrainz's live data feed to augment their music Web pages; the BBC online music editors will join the MusicBrainz community to contribute their knowledge to the database. On 28 July 2008, the beta of the new BBC Music site was launched, which publishes a page for each MusicBrainz artist.
Amarok – KDE audio player Banshee – multi-platform audio player Beets – automatic CLI music tagger/organiser for Unix-like systems Clementine – multi-platform audio player CDex – Microsoft Windows CD ripper Demlo – a dynamic and extensible music manager using a CLI iEatBrainz – Mac OS X deprecated foo_musicbrainz component for foobar2000 – Music Library/Audio Player Jaikoz – Java mass tag editor Max – Mac OS X CD ripper and audio transcoder Mp3tag – Windows metadata editor and music organizer MusicBrainz Picard – cross-platform album-oriented tag editor MusicBrainz Tagger – deprecated Microsoft Windows tag editor puddletag – a tag editor for PyQt under the GPLv3 Rhythmbox music player – an audio player for Unix-like systems Sound Juicer – GNOME CD ripper Zortam Mp3 Media Studio – Windows music organizer and ID3 Tag Editor. Freedb clients can access MusicBrainz data through the freedb protocol by using the MusicBrainz to FreeDB gateway service, mb2freedb. List of online music databases Making Metadata: The Case of Mus