The summation of multiple audio signals can be accomplished using digital or analog technologies. Digital summing and analog summing are not identical processes and, therefore, produce different results. In this study digital summing and analog summing were performed separately on the audio signals of three different recordings of music. These recordings represented three genres of music: classical, pop/country, and heavy rock. Twenty-one listeners participated in a preference test comparing digital summing to analog summing. Results indicated that listeners preferred one type of summing to the other; this preference was dependent on the genre of music.
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