Spatial microphones are used to acquire sound scenes, while spot microphones are commonly used to acquire individual sound sources with high quality. These recordings are essential when producing spatial audio upmixes. However, to automatically create upmixes, or to assist audio engineers in creating these, information about the position of the sources in the scene is also required. We propose a supervised sound source localization method to estimate the direction-of-arrival (DOA) of several simultaneously active sound sources in reverberant and noisy environments that utilizes several spot microphones and a single spatial microphone. The proposed method employs system identification techniques to estimate the relative impulse responses between each spot microphone and the spatial microphone from which the DOAs can be extracted.
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