“Moldovan DJ Andrew Rayel’s “How Do I Know” is the archetype of mainstream trance’s much-maligned formula: twinkling piano, an inane female vocal over squelching progressive synths, then a frenetic build-up that leads to a festival-ready drop. If Rayel’s version lends itself to a euphoric, perhaps amphetamine-boosted emotional release, Italian producer Lorenzo Senni’s edit induces a more introspect”