The world of musical entertainment offers a variety of diverse voices, but often individuals are overlooked and not awarded for their contribution. Individuals and organizations involved in music production, or simply any musicophiles, will appreciate this report, Inclusion in the Recording Studio? Gender and Race/Ethnicity of Artists, Songwriters & Producers across 900 Popular Songs from 2012-2020, from the University of Southern California Annenberg Inclusion Initiative and Spotify. The report, from March 2021, highlights numerous disparities faced by artists, producers, and songwriters from underrepresented groups. The report features multiple infographics calling attention to issues of diversity and inclusion, followed by textual summaries of key empirical findings that showcase how these inequalities have progressed over time. For instance, one startling finding is that "The ratio of men to women producers across 600 popular songs was 38 to 1," over the period under study, demonstrating how few women are represented in positions of power in the industry. This report was written by Stacy L. Smith, Katerine Pieper, Marc Choueiti, Karla Hernandez, and Kevin Yao.