On “The Hardest Part,” a new single from a forthcoming full length, multi-disciplinary artist Ernest Greene, AKA Washed Out, displays his knack for whimsical soundscapes. With a bubbly bassline and a rigid lead melody, it’s more pop-y and perhaps less ethereal than the music that made Washed Out ubiquitous in the mid-aughts (“Feel It All Around,” if you recall, was …