Place the rhythm and counter-rhythm in the drums. The rhythm is the solid beat or pattern that keeps the time of the song and should be played on the kick and snare drums. The counter-rhythm is a different pattern in opposition to the rhythm and is best placed on the toms and cymbals.
Play the foundation of the song on the bass. The foundation, also called main riff or musical pattern, comprises the notes and harmonies and usually are played with the beat of the rhythm, unique to the song. In a four- or five-piece band, the range of the bass is limited to the lower notes to make room for other instruments and usually terminates at the first octave. However, in a trio, the range of the bass is extended several octaves from bass to tenor, depending on the lowest range of the vocals.
Place the melody of the song into the vocals. The melody, a monophonic musical pattern, is distinct from the pattern of the rhythm, counter-rhythm and foundation. The melody is the main focus of the song and is supported by the other elements.
Play fills, solos and musical interludes when the melody is not sung. Every portion of a well-structured song has a focus or lead. The singer usually carries the lead in the melody, but when the singer is not singing, the drums or bass must take over. Insert a brief bass solo or a unique drum pattern when the singer is not singing.
Use counterpoint between the bass and vocals. Counterpoint is when two distinct musical patterns complement each other. While the drums must maintain the rhythm of the song, the bass and vocals are free to create counterpoint. For example, counterpoint in a trio can be playing ascending bass line against a sonorous descending vocal line or a staccato vocal line playing against a sonorous legato bass.