iTunes Signature Maker
iTunes Signature Maker (iTSM) analyzes your music collection and creates a short audio signature to represent who you are and what you listen to. After it checks your system configuration and asks you a few simple questions, iTSM will spend a few minutes analyzing your collection and generating the audio signature.
People often ask me what music I listen to, and I find it difficult to describe my enormous music collection in just a few sentences. So I created iTSM to answer in sound a question I cannot answer in words.
iTSM selects a small number of your “favorite” tracks based on some simple selection criteria, such as the number of times you have played them or the rating you have assigned them. Then it analyzes the audio content of these files, combining a small bit of each of them to create the signature.