标题： 语法结构和非度量伊朗古典音乐中的语法变化 显示英文标题

标题： Grammatical Structure and Grammatical Variations in Non-Metric Iranian Classical Music

摘要： 在本研究中，我们引入了一个由非度量伊朗古典音乐组成的符号数据集，以及用于解析这种音乐的算法和生成变奏的算法。 该语料库包括来自Radif Mirza Abdollah的Dastgah Shour的MIDI文件和数据表，这是伊朗古典音乐的基础曲目。 此外，我们将之前介绍的解析旋律结构的算法（Kanani等，2023b）应用于该数据集。 与许多西方音乐不同，这种非度量音乐不遵循以小节为中心的组织方式。 我们的解析算法可以很好地捕捉非度量组织。 我们将每首旋律（Gusheh）解析为一种语法，以识别主题和短语。 这些语法表示对于教育和民族音乐学目的可能很有用。 我们还进一步开发了之前介绍的创建旋律变奏的方法（Kanani等，2023b）。 在将现有旋律解析为语法后，通过对此语法应用突变，我们生成一个新的语法。 扩展这个新版本会产生原始旋律的一个变奏。 变奏由领域专家听众进行评估。 此外，我们对不同的表示设置进行了统计分析，以用于我们的解析和生成算法。 总体结论是，系统在突变后能够成功生成可接受的变奏。 虽然我们的案例研究专注于伊朗古典音乐，但该方法可以适应阿拉伯或土耳其古典音乐。 显示英文摘要

摘要： In this study we introduce a symbolic dataset composed of non-metric Iranian classical music, and algorithms for structural parsing of this music, and generation of variations. The corpus comprises MIDI files and data sheets of Dastgah Shour from Radif Mirza Abdollah, the foundational repertoire of Iranian classical music. Furthermore, we apply our previously-introduced algorithm for parsing melodic structure (Kanani et al., 2023b)to the dataset. Unlike much Western music, this type of non-metric music does not follow bar-centric organisation. The non-metric organisation can be captured well by our parsing algorithm. We parse each tune (Gusheh) into a grammar to identify motifs and phrases. These grammar representations can be useful for educational and ethnomusicological purposes. We also further develop a previously-introduced method of creating melodic variations (Kanani et al., 2023b). After parsing an existing tune to produce a grammar, by applying mutations to this grammar, we generate a new grammar. Expanding this new version yields a variation of the original tune. Variations are assessed by a domain-expert listener. Additionally, we conduct a statistical analysis of mutation with different representation setups for our parsing and generation algorithms. The overarching conclusion is that the system successfully produces acceptable variations post-mutation. While our case study focuses on Iranian classical music, the methodology can be adapted for Arabic or Turkish classical music.