Preprint for a book chapter introducing Audio Content Analysis. With a focus on Music Information Retrieval systems, this chapter defines musical audio content, introduces the general process of audio content analysis, and surveys basic approaches to audio content analysis. The various tasks in Audio Content Analysis are categorized into three classes: music transcription, music performance analysis, and music identification and categorization. The examples for music transcription systems include music key detection, fundamental frequency detection, and music structure detection. Music performance analysis systems feature an overview of beat and tempo detection approaches as well as music performance assessment. The covered music classification systems are audio fingerprinting, music genre classification, and music emotion recognition. The chapter concludes with a discussion and current challenges in the field and a speculation on future perspectives.

中文翻译：

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音频内容分析

介绍音频内容分析的书籍章节的预印本。本章重点介绍音乐信息检索系统，定义了音乐音频内容，介绍了音频内容分析的一般过程，并概述了音频内容分析的基本方法。音频内容分析中的各种任务分为三类：音乐转录，音乐性能分析以及音乐识别和分类。音乐转录系统的示例包括音乐键检测，基本频率检测和音乐结构检测。音乐性能分析系统概述了节拍和速度检测方法以及音乐性能评估。涵盖的音乐分类系统是音频指纹识别，音乐流派分类和音乐情感识别。