experience between professional artists in an appropriate atmosphere. Music Jazz, classical, folk and traditional music are among several genres that are popular in the city of Yerevan. A large number of ensembles, orchestras and choirs of different types of Armenian and international music are active in the city. The Armenian Philharmonic Orchestra founded in 1925, is one of the oldest musical groups in Yerevan and modern Armenia. The Armenian National Radio Chamber Choir founded in 1929, won the First Prize of the Soviet Union in the 1931 competition of choirs among the republics of the Soviet Union. Folk and classical music of Armenia was taught in state-sponsored conservatoires during the Soviet days. The Sayat-Nova Armenian Folk Song Ensemble was founded in Yerevan in 1938. Currently directed by Tovmas Poghosyan, the ensemble performs the works of prominent Armenian gusans such as Sayat-Nova, Jivani, and Sheram. In 1939, the Armenian National Academic Theatre of Opera and Ballet was opened. It is home to the Aram Khatchaturian concert hall and the Alexander Spendiarian auditorium of the National Theatre of Opera and Ballet. The Komitas Chamber Music House opened in 1977, is the home of chamber music performers and lovers in Armenia. In 1983, the Karen Demirchyan Sports and Concerts Complex was opened. It is currently the largest indoor venue in Armenia. The National Chamber Orchestra of Armenia (founded in 1961), Yerevan State Brass Band (1964), Folk Instruments Orchestra of Armenia (1977), Gusan and Folk Song Ensemble of Armenia (1983), Hover Chamber Choir (1992), Shoghaken Folk Ensemble (1995), Yerevan State Chamber Choir (1996), State Orchestra of Armenian National Instruments (2004), and the Youth State Orchestra of Armenia (2005), are also among the famous musical ensembles of the city of Yerevan. The Ars lunga piano-cello duo achieved international fame since its foundation in 2009 in Yerevan. Armenian religious music remained liturgical until Komitas introduced polyphony by the end of the 19th century. Starting from the late 1950s, religious music became widely spread when Armenian chants (also known as sharakans) were performed by the soprano Lusine Zakaryan. The state-run Tagharan Ensemble of Yerevan founded in 1981 and currently directed by Sedrak Yerkanian, also performs ritual and ancient Armenian music. Jazz is also among the popular genres in Yerevan. The first jazz band in Yerevan was founded in 1936. Currently, many jazz and ethno jazz bands are active in Yerevan such as Time Report, Art Voices, and