Which musical features of The Rite of Spring shocked many audience members in 1913?

The 1913 premiere of The Rite of Spring at the Théâtre des Champs-Élysées in Paris is remembered as one of the most scandalous events in musical theatre history. The audience's shock was driven by several revolutionary musical and theatrical features that challenged established conventions of the time:

• Rhythmic Innovation: The work featured chaotic, percussive momentum, constantly changing rhythms, and irregular metric imbalances that broke away from traditional symmetrical phrasing.123
• Dissonance: Stravinsky employed drastically dissonant harmonies that were not considered "beautiful" by the standards of the era, pushing the boundaries of harmony beyond previous experiments.123
• Orchestration: The score utilized barbaric tone colors and a new approach to instrumentation where strings were often subservient to brass and woodwinds, while percussion instruments were elevated to a new level of importance.24
• Choreography: The performance was further intensified by Vaslav Nijinsky’s unusual and suggestive choreography, which, combined with the daring music, created such a clamor that the dancers could not hear the orchestra.13