Music is a universal but diverse human trait. Using a dataset of 5,242 songs from 719 societies, this study identifies five major dimensions of musical diversity that show patterned geographic and historical structure. The authors then use these dimensions to ask whether they are related to genetic and linguistic relationships from 121 societies. Musical similarities are found to be only weakly related to language or genetic relationships, with stronger links only in certain regions such as Southeast Asia and sub-Saharan Africa with further analysis showing largely vertical transmission across generations. Overall, global musical traditions appear largely independent from genetic and linguistic histories.

The authors examine musical diversity in India using cantometric data from 32 Indian societies with the goal of better understanding how music varies between and within cultures. They find very minor musical differences between language families, greater diversity between societies but within language families, and the most variation within societies.

This study explores the prevalence of group singing and its relationship with changes in social organization's participatory dynamics, precisely community size and social differentiation. The authors use two samples: 1) 5776 audio recordings from 1024 societies and 2) 4709 ethnographic texts from 60 societies. There is significant support that group singing is more prevalent than solo singing. The results also show that community size predicts group singing in only one of the samples (GJB). However, there is no significant support for social differentiation as a predictor of group singing.