See also: Upbeat
For the Progressive/Thrash Metal group please refer to Anacrusis .
736, with an anacrusis shown in red.]]In poetry, anacrusis is the lead-in syllables, collectively, that precede the first full measure. Similarly, in music, it is the note or notes (even a phrase) which precede the first downbeat in a group. In the latter sense an anacrusis is often called a pickup, pickup note, or pickup measure. A piece of music beginning with an anacrusis will also end before the last beat of the last bar, in order to keep the number of bars in the entire piece at a whole number.In the song "Happy Birthday", the anacrusis forms the Happy and the accent is on Birthday.In the Star Spangled Banner, the word Oh in the first line is an anacrusis in both the music and the anapestic meter of the poem: