1. A method, comprising: formulating a maximum a posteriori (MAP) Independent Component Analysis (ICA) estimate of an unmixing matrix, a structure of the unmixing matrix incorporating prior knowledge regarding at least one of a distribution of sources in a sound capturing environment or a location of sources relative to one or more recording devices in the sound capturing environment; and unmixing one or more signals derived from one or more sounds captured in the sound capturing environment based at least in part upon the MAP ICA estimate.