a duo that is part of an organ recital (?) (see Molina)
Alonso de Molina:
ontecuicatl. duo que se canta encanto de organo. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 77r. col. 2. Thanks to Joe Campbell for providing the transcription.