To the Paris dreamer, the whimsical flow of the accordion soundtracks the city’s romantic, cobbled streets. In fact, accordions are an everyday part of the underground metro experience. Over 3,000 musicians play each day in Paris public transport to thousands of commuters - making the metro to some one of the biggest stages in the world. Reporter Tatiana Serova catches up with the metro’s diverse performers and puts her ear on the pulse of the Parisian trap scene.