Here are the tracks used for Switched at Birth episode 2021, The Departure of Summer, which aired on August 19, 2013.
Artist name: Young Summer
Song title: Why Try
This song plays when Daphne realizes she's become one of the 1%.
Artist name: Austin Hartley-Leonard
Song title: Angeline
This song plays when Ty & Bay make the most of their last days together.
Artist name: Cary Brothers (feat. Garrison Starr)
Song title: Disappear
This song plays when Turns out Toby & Nikki have great chemistry, why get married?
Artist name: Brave
Song title: Sara Bareilles
This song plays when Daphne faces her parents; she defends her actions.