Ambisonic Decoding for Compensated Amplitude Panning

Compensated amplitude panning (CAP) is a spatial audio reproduction method for loudspeakers that takes the listener head orientation into account. It can produce stable images in any direction using only two loudspeakers. In its original form, CAP is inherently an object-based method, with each image produced separately. An exact and efficient method is presented here for dynamically decoding a first order Ambisonic encoding, which is equivalent to using CAP to separately reproduce the constituents of the encoding. Both the stereo and multichannel cases are considered.