Question: Who decided on making original music in the movie Amélie?
About the article "Amélie", section "Musical adaptation".

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In 1900 in Paris, a new style of waltz emerged, the "Valse musette" an evolution of Bal-musette also known as "French Waltz".
Aimable, Émile Vacher, Marcel Azzola, Yvette Horner, André Verchuren were famous accordionists who played valse musette.
There is also Yann Tiersen and its Amélie (soundtrack) of Amélie from Montmartre. 
In his DVD commentary, Jeunet explains that he originally wrote the role of Amélie for the English actress Emily Watson; in the original draft, Amélie's father was an Englishman living in London.
However, Watson's French was not strong, and when she became unavailable to shoot the film, owing to a conflict with the filming of "Gosford Park", Jeunet rewrote the screenplay for a French actress.
Audrey Tautou was the first actress he auditioned having seen her on the poster for "Venus Beauty Institute".
The movie was filmed mainly in Paris.
The Café des 2 Moulins (15 Rue Lepic, Montmartre, Paris) where Amélie works is a real place.
The filmmakers made use of computer-generated imagery and a digital intermediate.
The studio scenes were filmed in the Coloneum Studio in Cologne (Germany).
The film shares many of the themes in the plot with second half of the 1994 film "Chungking Express". 
For the 2007 television show "Pushing Daisies", a "quirky fairy tale", American Broadcasting Company (ABC) sought an "Amélie" feel, with the same chords of "whimsy and spirit and magic".
"Pushing Daisies" director Bryan Fuller said "Amélie" is his favorite film.
"All the things I love are represented in that movie," he said.
"It's a movie that will make me cry based on kindness as opposed to sadness."
"The New York Times"' review of "Pushing Daisies" reported "the 'Amélie' influence on 'Pushing Daisies' is everywhere".
In the 2009 film "Bunny and the Bull", the scenes set in the real world of Stephen's flat have the same red, green and gold feel of "Amelie"'s interiors.
Additionally, the opening credits are similar to "Delicatessen", an earlier film of Amélie's director Jean-Pierre Jeunet.
A species of frog was named "Cochranella amelie".
The scientist who named it said: "this new species of Glass frog is for Amélie, protagonist of the extraordinary movie "Le Fabuleux Destin d'Amélie Poulain"; a film where little details play an important role in the achievement of joie de vivre; like the important role that Glassfrogs and all amphibians and reptiles play in the health of our planet".
The species was described in the scientific journal "Zootaxa" in an article entitled "An enigmatic new species of Glassfrog (Amphibia: Anura: Centrolenidae) from the Amazonian Andean slopes of Ecuador"The song "La Valse d'Amélie" from the soundtrack of the film was sampled in the song "Diary" on the 2009 album "Attention Deficit" by hip-hop artist Wale.
The girl's name Amelie soared in popularity after the release of the film. 
The child of François Renard and Anna-Rose Colin, Renard was born in Châlons-du-Maine, Mayenne where his father was working on the construction of a railroad.
Renard grew up in Chitry-les-Mines, (Nièvre).
He had three older siblings including Amélie (b.
1858), who died at a young age.
A second sister was also named Amélie (b.
1859).
A third child, Maurice, was born before Pierre-Jules in 1862.
Renard's childhood was characterized as difficult and sad ("un grand silence roux" or "a great ruddy silence").
Although he decided not to attend the prestigious École normale supérieure, love of literature would eventually dominate his life.
From 1885–1886, he served in the military in Bourges. 
  The crash inspired a 1952 novel in French, "La neige en deuil" ("The Snow in Mourning"), by Henri Troyat.
The 1956 film "The Mountain" starring Spencer Tracy was based on the above novel "La neige en deuil".
In the 2001 movie "Amélie", the title character reads a newspaper article about alpinists finding, by chance, a mailbag on Mont Blanc and later realizing it came from the "Malabar Princess" that crashed 40 years earlier.
This news inspires Amélie to do good to the lonely concierge, by faking a final love letter from her late husband, supposedly found inside that mailbag.
The 2004 movie "Malabar Princess"  is about a young boy called Tom who is sent to live with his grandfather in the French Alps after his mother dies on an excursion with her husband.
Tom becomes friends with Benoît, and the two search for the remains of the Malabar Princess.