Bolero is a one-movement orchestral piece by the French composer Maurice Ravel (1875–1937). Originally composed as a ballet commissioned by Russian actress and dancer Ida Rubinstein, the piece, which premiered in 1928, is Ravel's most famous musical composition.
According to some, the snare drum part of the Bolero is one of the most demanding orchestral parts in existence. In the (full length) piece’s 15-minute running time, there are a whopping 4,050 individual notes. Trouble is, those notes are made up of a seemingly endless repeat of the exact same pattern, making the whole ordeal an extreme exercise in patience and poise.
The graphic representation shows what might go through a drummer’s head during this example of mental torture.
source: Classic FM