High-order Ambisonics 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 considered the implications for high quality rendering of high-order encodings with binaural systems, and identify limitations in the encoding, and ways it can be improved.

• "Nearfield Binaural Synthesis and Ambisonics", J.Acous.Soc.Am. March 2007.
• "Ambisonic Synthesis of Complex Sources", J. Audio Eng. Soc. October 2007.

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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