Final answer:
In 2009, Eric Whitacre's music reached millions through his Internet Virtual Choir project, an innovative way for singers to join a global choir online.
Step-by-step explanation:
In 2009, Eric Whitacre's music was heard by millions of people, who could watch and listen through his Internet Virtual Choir project. This innovative online initiative allowed singers from around the globe to participate in a collective choral performance by submitting videos of themselves singing. The result was combined into a unified choir that presented a powerful and emotional musical experience, similar to the stirring sermons of George Whitefield who was known for evoking emotional responses during his open-air preaching.