1. A beat analysis module for analyzing an audio item, comprising: an average beat period determination module for determining an average beat period of an audio item, the average beat period determination module being configured to use an Expectation-Maximization (EM) approach to determine the average beat period, wherein correlation is performed over plural representations of the audio item; and a beat onset determination module for determining, on a basis of the average beat period, onset information associated within the commencement of beats within the audio item.