This visualization analyzes a Spotify tracks dataset, showing how popularity relates to audio features. It displays binned histograms for selected attributes like danceability or energy, with each bar split to reveal both the average popularity and the count of tracks in that bin, colored by mean loudness. The interactive view lets users switch audio features via a dropdown and adjust the number of bins with a slider. Built with React and D3, it uses D3 scales (scaleBand, scaleLinear), rollups for aggregation, and renders as animated SVGs.