Pentatonix is the eponymous fourth studio album by American a cappella group Pentatonix, to be released on October 16, 2015. The release date was announced on Twitter by a series of pictures featuring the five band members released over a five day-span, with one band member added to the picture each day, culminating in the date being revealed on August 28 2015. It is the band's seventh release. Pentatonix (or PTX) is an American a cappella group consisting of five vocalists originating from Arli