Katie Herzig skipped past her folk singer/songwriter beginnings with 2011's The Waking Sleep, moving into a dream pop arena full of synths, loops, and beats, and with Walk Through Walls, she expands things even more in the atmospheric, confessional dream pop direction, coming up with a multi-layered sound that is as carefully textured, challenging, and complex as it is accessible in a contemporary world, which might explain why so many of her tracks end up in commercials and on the soundtracks to films and television shows.