High-order Ambisonics (HOA) allows the detailed encoding of soundfields, containing near and far sources. This work considers the composition of synthetic soundfields using encodings of source objects that can be reused in different positions and orientations. This is the natural conclusion to 'O-format' considered in earlier work.

I have also investigates related methods for synthesizing near-field binaural images using just the far-field HRTFs. Current research is looking at combining HOA with focused source rendering.

• "Ambisonic Synthesis of Complex Sources", J. Audio Eng. Soc. October 2007.
• "Nearfield Binaural Synthesis and Ambisonics", J.Acous.Soc.Am. March 2007.
• "Near-field HRTFs from Point Source Representations", Ambisonic Symposium, IEM Graz, June 24-28 2009.

The images below shows the direct field of a complex source at O, and part of this field accurately resynthesized at B around the listener, using a high-order Ambisonic encoding derived from the source.

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