In this paper we address the issue of real-time rhythmic analysis, primarily towards predicting the locations of musical beats such that they are consistent with a live audio input. This will be a key component required for a system capable of automatic accompaniment with a live musician. We implement our approach as part a real-time audio library. Due to the removal of "future" audio information for this causal system, performance is reduced in comparison to our previous non-causal system, although still acceptable for our intended purpose.
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