Musi... — An Introduction To Audio Content Analysis:

Alexander Lerch's "An Introduction to Audio Content Analysis" (2nd ed.) provides a comprehensive guide to extracting musical information—such as tempo, key, and structure—from raw audio signals. The text, supported by online code repositories and visualizations, bridges theoretical signal processing with practical machine learning applications for Music Information Retrieval (MIR). Explore the official companion site for more resources at Audio Content Analysis audiocontentanalysis.org.