Many musical traditions – from Western art, to popular and commercial – organize pitch phenomena around a referential pitch class (or tonic) and feature triads and seventh chords. As a result, triadic progressions associated with one tradition sometimes resurface in others. How, then, are we to distinguish between the conventional harmonic patterns that span several time periods, and the characteristic idioms that delimit a single period?

This essay presents a comparative study of triadic progressions in four data sets comprised of expert harmonic annotations: Annotated Beethoven Corpus (ABC), Theme and Variation Encodings with Roman Numerals (TAVERN), Rolling Stone-200 (RS-200), and McGill Billboard (Billboard). Using methods for counting, filtering, and ranking multichord expressions, we reveal conventional and characteristic progressions and examine broad trends over time. We also include an accompanying standalone application that allows users to adjust various stages of the model pipeline and export the data for further exploration and analysis.

许多音乐传统——从西方艺术到流行和商业——围绕参考音级（或主音）组织音高现象，并以三和弦和七和弦为特色。结果，与一种传统相关的三元级数有时会在其他传统中重新出现。那么，我们如何区分跨越多个时间段的传统和声模式和划定单个时间段的特征习语？

本文介绍了对由专家和声注释组成的四个数据集的三重进行的比较研究：带注释的贝多芬语料库 (ABC)、罗马数字主题和变奏编码 (TAVEN)、滚石 200 (RS-200) 和 McGill Billboard （广告牌）。使用计数、过滤和排列多和弦表达的方法，我们揭示了传统和特征进行，并检查随着时间的推移广泛的趋势。我们还包括一个随附的独立应用程序，允许用户调整模型管道的各个阶段并导出数据以进行进一步的探索和分析。