Determining azimuth and elevation angles from stereo recordings

A method, comprising:

• receiving input audio data including first microphone audio signals and second microphone audio signals output by a pair of coincident, vertically-stacked directional microphones;
• determining, based at least in part on an intensity difference between the first microphone audio signals and the second microphone audio signals, an azimuthal angle corresponding to a sound source location;
• determining, based at least in part on a temporal difference between the first microphone audio signals and the second microphone audio signals, an elevation angle corresponding to the sound source location;
• determining an object size parameter of the sound source;
• determining a diffuse residual that corresponds to uncorrelated components of the first microphone audio signals and the second microphone audio signals;
• representing the diffuse residual as a pair of additional audio objects having a large size and large decorrelation parameters;
• and
• generating output audio data including at least one audio object corresponding to a sound source, the audio object comprising audio object signals and associated audio object metadata, the audio object metadata including at least audio object location data corresponding to the sound source location.