Vocal secular music in 17th century Spain began to be studied when Francisco Asenjo Barbieri and Felipe Pedrell showed interest for the issue at the end of the 19th century. Everything pointed to an exponential increase in those studies with the arrival of the 21st century, but it was not the case. Once the first years of the new millennium were over, in which the studies by Gerardo Arriaga, Lola Josa and a few others were published, the research drastically decreased. This album aims to rekindle that preservation. The works here are sung pieces, in verse and vernacular language, known in that period as human tones (or just tones) when they were profane, and divine tones when they were religious. Those composed in the first half of the 17th century were mostly polyphonic, which reveals that, in this period, polyphony was still thought to be highest. The Book of Human Tones, preserved at present at the National Library of Spain under the signature M 1262, constitutes, with its 222 works, a privileged sample of all the aspects. Who might be interested in these works has now the possibility to listen to them in a retrained performance on four voices with harp accompaniment, one of the instruments used in this repertoire. If, on the one hand, the vocal quartet shows that the “grace notes” (“quiebros”) and voice effects do not constitute an impediment for the care of tuning, on the other hand the harp adds to the score beautiful introductory and transition passages based on the features of passacaglias and 17th century dances.