I heard this song for the first time from Isao Tomita's synthesizer performance.
The famous melody is played almost daily on TV commercials, the original early Debussy piano piece.
Of the work in 1888, announced as "Deux Arabesques" in 1891, this is the first. In Paris at that time, the arabesque pattern was popular, and that image was incorporated into music and ballet of the day.
When played on the piano, pedal is used a lot, so the arpeggio has a beautiful sound particular to Debussy, and this arrangement is devised to make it possible for wind instruments.
The trick is to reproduce the attenuation of the sound sustained by the pedal and to create the flow of the melody without losing the legato, but since multiple people form one accompaniment, it is challenging to create full ensemble techniques such as standardized pronunciation, volume, timbre and timing.

(Takeo Kimura)