Isometric minimalist vector graphic. A giant, bright yellow cassette tape floating slightly above a perfectly flat, matte black plane. A harsh, low-angle spotlight creates a severe, razor-sharp long shadow extending from the cassette. Within the dark, elongated shadow itself, glowing neon audio waveforms and intricate sound wave patterns are embedded, creating a hidden universe inside the silhouette. Clean, geometric layout, long shadow design trend, flat illustration.