one art elizabeth bishop A radio signal is usually very weak and should not travel long distances on its own. A method to handle this challenge is to use a strategy called Amplitude Modulation or AM. The technique imposes an additional signal on the already existing carrier wave that transmits the info. The amplitude in the second signal varies (increases or decreases) correspondingly on the amplitude in the first wave. These variations in amplitude or strength are employed through the receiver in order to reproduce audio and visual information (different sounds and images). Although the the church and worship are no longer 2000 years old, we are able to only trace Gospel music on the 1700s. Gospel Song Lyrics have become repetitive. Many believe this arises from the slave occasions when blacks were not able to to learn, this allowed them also to get acquainted with the worship. The worship services also played a large role in reinforcing the slavery indoctrination, because sermons were often extracted from St. Paul which brought up: good servants, loving, obeying and trusting one?s master. The hymns in the white master took over as backdrop for the music of the enslaved Africans which later they used in worship meetings.