Post-tonal analytic tools have value for surveying vast collections of music of variable pitch content and collection size. Richard Chrisman’s successive-interval array enables the encoding of intervals spanning various pitches without having to commit to analytical associations implied by traditional tonal scalar or modal descriptors (1971, 1977). The use of tonic-centered successive-interval arrays to map a large collection of music can be a powerful tool to distill emergent scalar collections. This presentation will highlight prior collecting and analyses, introduce the tonic-centered successive-interval array, and demonstrate its application surveying approximately 2,000 traditional Nova Scotian-sourced songs spanning English, French, and Gaelic languages to identify cumulative and language-specific trends with this repertoire.