Which section is not one of the four groups in the orchestral palette , strings , vouces , brass or percussion?

An orchestra is defined as a large instrumental ensemble typical of classical music. An orchestra features bass, brass, strings, woodwinds, and percussions. In the list given above, the section that is not one of the four groups in the orchestral palette is the voices. The answer would be "voices". 

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Jordan davis is the person who singed “singles you up”