Abstract: This invention relates to a system that will allow plural turntable recorded music sources that can have unique basic bass rhythm beat patterns played consecutively with the basic bass rhythm patterns synchronized such that a listener of the music senses that the bass beat rhythm patterns appear uninterrupted from one recorded musical piece to the next. Each of the music sources have means to vary the basic rhythm rate. The system included in combination a first and a second input signal representative of the sources of recorded music. There are provided first and second bass beat rhythm detectors respectively electrically coupled to the plural sources of recorded music to receive the first and the second input signals and provide a first and a second output signal which contain exclusively the bass beat rhythm of the respective sources.