US-based sales of CD albums plunged 12.9 percent last year, according to figures released by the RIAA this week. The decrease is the largest ever for the format, and complements information recently released by Nielsen Soundscan.  Overall physical sales were worse, dipping a pronounced 13.8 percent.  Broader music sales, which include digital and mobile formats, … Continue reading US-Based CD Sales Plunge 13 Percent During 2006