As the number of chants in the church's repertoire increased, officials needed a better way to standardize the music. A unique form of musical notation was developed to help standardize the music and provide a reference for the performers and audience alike. The musical notations that were used were called neumes, and they are employed on a four-line staff, unlike the five-line staff we are accustomed to today. The neumes are placed above the chant's words to help the performer identify the piece's melody but did not specify the pitches or intervals that needed to be sung. Even though there were written musical manuscripts, the performers still needed to memorize the chants through oral traditions before interpreting the notation. It was not until the eleventh century that musical pitches were being integrated into written music.