原文: Dixit Dominus Petrus. Contains a canon at the unison between the two top parts. Francisco Guerrero. A cappella. Language.
译文: The title and opening words are ungrammatical, and should read 'Dixit Dominus Petro'. 弗朗西斯科·格雷罗. 无伴奏合唱. 神圣,经文歌. 语. Latin.