Impressionistic lovers, Caribbean parakeets, epic panoramas of a blindingly beautiful sunset, sublimely orchestrated pop music. Yep, it’s new work from Jónsi Birgisson, the ever-precious songbird who fronts Sigur Rós. He is striking out on his own for the first time, and “Go Do” is a track from his solo record, Go (XL), which was produced by Birgisson, his partner Alex Somers and Peter Katis (National, Interpol). The imagery of birds taking flight matches the song’s ceremonious aesthetic perfectly, as Nico Muhly’s orchestration lifts Birgisson’s ebullient vocal melody above scattered percussive and rhythmic flourishes with an elegance few could pull off. Go arrives April 6, the same night Jónsi kicks off his solo tour in Vancouver.