Supporting data for "Musical scales optimize pitch spacing: A global analysis of traditional vocal music"

Fundamental frequency (f0) of singers, and the GMM parameters (means, weights, variances) of the fitted scale models, for 411 vocal songs. This data is based on the same set of recordings used to produce another study, for which the data is hosted separately on OSF. The previous study used manual scale annotations, and a method for estimating "vocal imprecision". The manual scale annotations were used as the starting point for the semi-automated scale annotations provided here.

"scale_data.csv" contains the metadata for the scales, including the manual scale annotations and the semi-automated scale annotations (GMM means). For each scale, the scale degrees are reported together in single CSV cells, in JSON string format. Additional information is provided to help with mapping between this data and the previous version hosted on OSF. In cases where semi-automated analyses led to updated manual annotations, these new annotations are not recorded here (but one can infer the closest manual annotation given the semi-automated scale annotations).

"GMM_parameters.csv" contains the parameters used for filtering the f0 data, in order to get a clean GMM that best matches the perceived scale (perception here includes listening to the original recording, and visually examining the f0 melograph).

"README" contains descriptions of the columns in CSV files.

"SupplementaryData" contains the f0 data (F0), the GMM parameters (Scales), and visualizations of the f0 and fitted GMM (PitchTraceFigures). For help in understanding the figures in PitchTraceFigures, please check the caption for Figure 2 in the main text of the related paper, or Supplementary Figure 6 in the associated supplementary information file.