As a project predicated on the unique creative chemistry between siblings, it feels apt that Will Gao and Olivia Hardy’s second EP is named Isotope. Two distinct branches of the same tree, as Wasia Project they’ve spent the last five years applying their classical training to wide-eyed jazz-pop, racking up tens of millions of streams, and securing US support dates with Laufey and a European arena tour with Tom Odell. Now they’re expanding their horizons even further, pairing their genre-bending pop with an impressive audio-visual concept.