A new chief conductor Kirill Petrenko conducts the Berliner Philharmoniker philharmonic orchestra performing the Ninth Symphony by Ludwig van Beethoven during a free, open-air concert in front of the Brandenburg Gate in Berlin, Germany, August 24, 2019. REUTERS/Fabrizio Bensch 

A new chief conductor Kirill Petrenko conducts the Berliner Philharmoniker philharmonic orchestra performing the Ninth Symphony by Ludwig van Beethoven during a free, open-air concert in front of the Brandenburg Gate in Berlin, Germany, August 24, 2019. REUTERS/Fabrizio Bensch 

A new chief conductor Kirill Petrenko arrives to conduct the Berliner Philharmoniker philharmonic orchestra performing the Ninth Symphony by Ludwig van Beethoven during a free, open-air concert in front of the Brandenburg Gate in Berlin, Germany, August 24, 2019. REUTERS/Fabrizio Bensch 

A new chief conductor Kirill Petrenko arrives to conduct the Berliner Philharmoniker philharmonic orchestra performing the Ninth Symphony by Ludwig van Beethoven during a free, open-air concert in front of the Brandenburg Gate in Berlin, Germany, August 24, 2019. REUTERS/Fabrizio Bensch 

A new chief conductor Kirill Petrenko arrives to conduct the Berliner Philharmoniker philharmonic orchestra performing the Ninth Symphony by Ludwig van Beethoven during a free, open-air concert in front of the Brandenburg Gate in Berlin, Germany, August 24, 2019. REUTERS/Fabrizio Bensch 

A new chief conductor Kirill Petrenko conducts the Berliner Philharmoniker philharmonic orchestra performing the Ninth Symphony by Ludwig van Beethoven during a free, open-air concert in front of the Brandenburg Gate in Berlin, Germany, August 24, 2019. REUTERS/Fabrizio Bensch 

A new chief conductor Kirill Petrenko conducts the Berliner Philharmoniker philharmonic orchestra performing the Ninth Symphony by Ludwig van Beethoven during a free, open-air concert in front of the Brandenburg Gate in Berlin, Germany, August 24, 2019. REUTERS/Fabrizio Bensch 

People arrive at the spot where new chief conductor Kirill Petrenko conducts the Berliner Philharmoniker philharmonic orchestra performing the Ninth Symphony by Ludwig van Beethoven during a free of charge, open-air concert in front of the Brandenburg Gate in Berlin, Germany August 24, 2019. REUTERS/Fabrizio Bensch 

People wait at the spot where new chief conductor Kirill Petrenko conducts the Berliner Philharmoniker philharmonic orchestra performing the Ninth Symphony by Ludwig van Beethoven during a free of charge, open-air concert in front of the Brandenburg Gate in Berlin, Germany August 24, 2019. REUTERS/Fabrizio Bensch 

People wait at the spot where new chief conductor Kirill Petrenko conducts the Berliner Philharmoniker philharmonic orchestra performing the Ninth Symphony by Ludwig van Beethoven during a free of charge, open-air concert in front of the Brandenburg Gate in Berlin, Germany August 24, 2019. REUTERS/Fabrizio Bensch 

People wait at the spot where new chief conductor Kirill Petrenko conducts the Berliner Philharmoniker philharmonic orchestra performing the Ninth Symphony by Ludwig van Beethoven during a free of charge, open-air concert in front of the Brandenburg Gate in Berlin, Germany August 24, 2019. REUTERS/Fabrizio Bensch 

People arrive at the spot where new chief conductor Kirill Petrenko will conduct the Berliner Philharmoniker philharmonic orchestra performing the Ninth Symphony by Ludwig van Beethoven during a free, open-air concert in front of the Brandenburg Gate in Berlin, Germany, August 24, 2019. REUTERS/Fabrizio Bensch 

People arrive at the spot where new chief conductor Kirill Petrenko will conduct the Berliner Philharmoniker philharmonic orchestra performing the Ninth Symphony by Ludwig van Beethoven during a free, open-air concert in front of the Brandenburg Gate in Berlin, Germany, August 24, 2019. REUTERS/Fabrizio Bensch 

A general view shows the stage where new chief conductor Kirill Petrenko with the Berliner Philharmoniker orchestra will perform the 9th Symphony by Ludwig van Beethoven during an upcoming free of charge, open-air concert in front of the Brandenburg Gate in Berlin, Germany, August 23, 2019. REUTERS/Fabrizio Bensch 

Conductor Ewan Campbell uses a specially developed baton which opens up the orchestra to blind musicians, transmitting its movements to vibrating bands worn on violinist Abie Baker's wrist and pianist Kevin Satizbal's ankle in a studio in London, Britain February 21, 2019. Picture taken February 21, 2019. REUTERS/Stuart McDill 

Vahakn Matossian poses for the camera holding his haptic baton which allows blind people to follow a conductor in an orchestra, in a studio in London, Britain February 21, 2019. The baton's movements are transmitted to vibrating bands worn on the blind musician's ankle or wrist. Picture taken February 21, 2019. REUTERS/Stuart McDill 

Vahakn Matossian poses for the camera holding his haptic baton which allows blind people to follow a conductor in an orchestra, in a studio in London, Britain February 21, 2019. The baton's movements are transmitted to vibrating bands worn on the blind musician's ankle or wrist. Picture taken February 21, 2019. REUTERS/Stuart McDill 

Conductor Ewan Campbell uses a specially developed baton which opens up the orchestra to blind musicians, allowing them to follow vibrations, in a studio in London, Britain February 21, 2019. Picture taken February 21, 2019. REUTERS/Stuart McDill 

Vahakn Matossian poses for the camera holding his haptic baton which allows blind people to follow a conductor in an orchestra, in a studio in London, Britain February 21, 2019. The baton's movements are transmitted to vibrating bands worn on the blind musician's ankle or wrist. Picture taken February 21, 2019. REUTERS/Stuart McDill 

Conductor Ewan Campbell uses a specially developed baton which opens up the orchestra to blind musicians, transmitting its movements to vibrating bands worn on violinist Abie Baker's wrist and pianist Kevin Satizbal's ankle in a studio in London, Britain February 21, 2019. Picture taken February 21, 2019. REUTERS/Stuart McDill 

Violinist Abie Baker wears a wristband receiving the movements from conductor Ewan CampbellÕs specially developed baton, turning the instructions into vibrations and in turn opening up the orchestra to blind musicians, in a studio in London, Britain February 21, 2019. Picture taken February 21, 2019. REUTERS/Stuart McDill 

A blind violinist Abie Baker wears a wristband receiving the movements from a specially developed baton which turns them into vibrations and in turn opens up the orchestra to blind musicians, in a studio in London, Britain February 21, 2019. Picture taken February 21, 2019. REUTERS/Stuart McDill 

Conductor Ewan Campbell uses a specially developed baton which opens up the orchestra to blind musicians, transmitting its movements to vibrating bands worn on violinist Abie Baker's wrist and pianist Kevin Satizbal's ankle in a studio in London, Britain February 21, 2019. Picture taken February 21, 2019. REUTERS/Stuart McDill 

Conductor Ewan Campbell uses a specially developed baton which opens up the orchestra to blind musicians, transmitting its movements to vibrating bands worn on violinist Abie Baker's wrist and pianist Kevin Satizbal's ankle in a studio in London, Britain February 21, 2019. Picture taken February 21, 2019. REUTERS/Stuart McDill 

German Chancellor Angela Merkel receives a conductor's baton of orchestra conductor Kent Nagano as a farewell gift during the Christian Democratic Union (CDU) party congress in Hamburg, Germany, December 7, 2018. REUTERS/Fabrizio Bensch 

German Chancellor Angela Merkel receives a conductor's baton of orchestra conductor Kent Nagano as a farewell gift during the Christian Democratic Union (CDU) party congress in Hamburg, Germany, December 7, 2018. REUTERS/Fabrizio Bensch 

German Chancellor Angela Merkel receives a conductor's baton of orchestra conductor Kent Nagano as a farewell gift during the Christian Democratic Union (CDU) party congress in Hamburg, Germany, December 7, 2018. REUTERS/Fabrizio Bensch 

German Chancellor Angela Merkel receives a conductor's baton of orchestra conductor Kent Nagano as a farewell gift during the Christian Democratic Union (CDU) party congress in Hamburg, Germany, December 7, 2018. REUTERS/Kai Pfaffenbach 

German Chancellor Angela Merkel receives a conductor's baton of orchestra conductor Kent Nagano as a farewell gift during the Christian Democratic Union (CDU) party congress in Hamburg, Germany, December 7, 2018. REUTERS/Fabrizio Bensch 

REFILE - CORRECTING ORCHESTRA NAME Conductor Karim Wasfi leads the Peace Through Arts Farabi Orchestra during a concert in Mosul, Iraq October 27, 2018. Picture taken October 27, 2018. REUTERS/Ari Jalal 

REFILE - CORRECTING ORCHESTRA NAME Karim Wasfi, conductor of the Peace Through Arts Farabi Orchestra, trains the musicians on musical tracks in Mosul, Iraq October 26, 2018. Picture taken October 26, 2018. REUTERS/Ari Jalal 

REFILE - CORRECTING ORCHESTRA NAME Anime Mal Kounian plays the violin with Karim Wasfi, conductor of the Peace Through Arts Farabi Orchestra, during a concert in Mosul, Iraq October 27, 2018. Picture taken October 27, 2018. REUTERS/Ari Jalal 

REFILE - CORRECTING ORCHESTRA NAME Ban Chakib plays the piano with Karim Wasfi, conductor of the Peace Through Arts Farabi Orchestra, during a concert in Mosul, Iraq October 27, 2018. Picture taken October 27, 2018. REUTERS/Ari Jalal 

REFILE - CORRECTING ORCHESTRA NAME Conductor Karim Wasfi leads the Peace Through Arts Farabi Orchestra during a concert in Mosul, Iraq October 27, 2018. Picture taken October 27, 2018. REUTERS/Ari Jalal 

REFILE - CORRECTING ORCHESTRA NAME Hadeer Saad plays the violin with Karim Wasfi, conductor of the Peace Through Arts Farabi Orchestra, in Mosul, Iraq October 26, 2018. Picture taken October 26, 2018. REUTERS/Ari Jalal 

REFILE - CORRECTING ORCHESTRA NAME Conductor Karim Wasfi leads the Peace Through Arts Farabi Orchestra during a concert in Mosul, Iraq October 27, 2018. Picture taken October 27, 2018. REUTERS/Ari Jalal 

Hadeer Saad plays the violin with Karim Wasfi, conductor of the Peace Through Arts Farabi Orchestra, in Mosul, Iraq October 26, 2018. Picture taken October 26, 2018. REUTERS/Ari Jalal 

Conductor Karim Wasfi leads the Peace Through Arts Farabi Orchestra during a concert in Mosul, Iraq October 27, 2018. Picture taken October 27, 2018. REUTERS/Ari Jalal 

Anime Mal Kounian plays the violin with Karim Wasfi, conductor of the Peace Through Arts Farabi Orchestra, during a concert in Mosul, Iraq October 27, 2018. Picture taken October 27, 2018. REUTERS/Ari Jalal 

Karim Wasfi, conductor of the Peace Through Arts Farabi Orchestra, trains the musicians on musical tracks in Mosul, Iraq October 26, 2018. Picture taken October 26, 2018. REUTERS/Ari Jalal 

Ban Chakib plays the piano with Karim Wasfi, conductor of the Peace Through Arts Farabi Orchestra, during a concert in Mosul, Iraq October 27, 2018. Picture taken October 27, 2018. REUTERS/Ari Jalal 

Conductor Karim Wasfi leads the Peace Through Arts Farabi Orchestra during a concert in Mosul, Iraq October 27, 2018. Picture taken October 27, 2018. REUTERS/Ari Jalal 

Conductor Karim Wasfi leads the Peace Through Arts Farabi Orchestra during a concert in Mosul, Iraq October 27, 2018. Picture taken October 27, 2018. REUTERS/Ari Jalal 

Conductor Karim Wasfi leads the Peace Through Arts Farabi Orchestra during a concert in Mosul, Iraq October 27, 2018. Picture taken October 27, 2018. REUTERS/Ari Jalal 

A general view of the stage and public as British conductor Simon Rattle gives his final concert as chief conductor of the Berlin Philharmonic in the Berliner Waldbuehne, or Forest Stage concert location, in Berlin, Germany, June 24, 2018. REUTERS/Michele Tantussi 

A general view of the stage and public as British conductor Simon Rattle gives his final concert as chief conductor of the Berlin Philharmonic in the Berliner Waldbuehne, or Forest Stage concert location, in Berlin, Germany, June 24, 2018. REUTERS/Michele Tantussi 

British conductor Simon Rattle gives his final concert as chief conductor of the Berlin Philharmonic in the Berliner Waldbuehne, or Forest Stage concert location, in Berlin, Germany, June 24, 2018. REUTERS/Michele Tantussi 

British conductor Simon Rattle gives his final concert as chief conductor of the Berlin Philharmonic in the Berliner Waldbuehne, or Forest Stage concert location, in Berlin, Germany, June 24, 2018. REUTERS/Michele Tantussi 

British conductor Simon Rattle gives his final concert as chief conductor of the Berlin Philharmonic in the Berliner Waldbuehne, or Forest Stage concert location, in Berlin, Germany, June 24, 2018. REUTERS/Michele Tantussi 

British conductor Simon Rattle gives his final concert as chief conductor of the Berlin Philharmonic in the Berliner Waldbuehne, or Forest Stage concert location, in Berlin, Germany, June 24, 2018. REUTERS/Michele Tantussi 

British conductor Simon Rattle gives his final concert as chief conductor of the Berlin Philharmonic in the Berliner Waldbuehne, or Forest Stage concert location, in Berlin, Germany, June 24, 2018. REUTERS/Michele Tantussi 

British conductor Simon Rattle gives his final concert as chief conductor of the Berlin Philharmonic in the Berliner Waldbuehne, or Forest Stage concert location, in Berlin, Germany, June 24, 2018. REUTERS/Michele Tantussi 

British conductor Simon Rattle gives his final concert as chief conductor of the Berlin Philharmonic in the Berliner Waldbuehne, or Forest Stage concert location, in Berlin, Germany, June 24, 2018. REUTERS/Michele Tantussi 

British conductor Simon Rattle gives his final concert as chief conductor of the Berlin Philharmonic in the Berliner Waldbuehne, or Forest Stage concert location, in Berlin, Germany, June 24, 2018. REUTERS/Michele Tantussi 

British conductor Simon Rattle gives his final concert as chief conductor of the Berlin Philharmonic in the Berliner Waldbuehne, or Forest Stage concert location, in Berlin, Germany, June 24, 2018. REUTERS/Michele Tantussi 

British conductor Simon Rattle gives his final concert as chief conductor of the Berlin Philharmonic in the Berliner Waldbuehne, or Forest Stage concert location, in Berlin, Germany, June 24, 2018. REUTERS/Michele Tantussi 

British conductor Simon Rattle gives his final concert as chief conductor of the Berlin Philharmonic in the Berliner Waldbuehne, or Forest Stage concert location, in Berlin, Germany, June 24, 2018. REUTERS/Michele Tantussi 

British conductor Simon Rattle gives his final concert as chief conductor of the Berlin Philharmonic in the Berliner Waldbuehne, or Forest Stage concert location, in Berlin, Germany, June 24, 2018. REUTERS/Michele Tantussi 

British conductor Simon Rattle gives his final concert as chief conductor of the Berlin Philharmonic in the Berliner Waldbuehne, or Forest Stage concert location, in Berlin, Germany, June 24, 2018. REUTERS/Michele Tantussi 

British conductor Simon Rattle gives his final concert as chief conductor of the Berlin Philharmonic in the Berliner Waldbuehne, or Forest Stage concert location, in Berlin, Germany, June 24, 2018. REUTERS/Michele Tantussi