Gal, João Gilberto and Caetano are masters, but besides that, they are passionated for brazilian music. Also Gal and Caetano were huge fans of João Gilberto itself, it is not a coincidence at all that Caetano and Gal play "Saudosismo" - a huge influenced and referencial song to João Gilberto - right before João starts to sing his own songs.
All these songs were handpicked to show their influences - almost all of them were composed by songwriters born in Bahia, the state where Gal, Caetano and João were also born (and me too!!!) - there is a version of a Bahia folk song (Fruta Gogoia), versions of classical samba songs (Arlequim de Bronze, Largo da Lapa, Você já foi à Bahia?) and even a Caetano Veloso version of the most iconic Forró/Baião song (Asa Branca).
In short, this is not only emotional because of the story of something found after considered lost, but also because it is about masters singing about their influences (other masters) - there is even a moment on "Na Asa do Vento" in which Caetano says he wasn't supposed to sing this song, but he does anyway since he likes it a lot. It is about the the feeling of being a part of this musically amazing country. I absolutely love this album, wouldn't change a single second of it.