Abstract: A method of creating a compressed audio output signal from a series of input audio signals is disclosed and claimed. In one embodiment, the method may include, for each of the input audio signals a) precomputing a transform corresponding to the desired compression format of the output audio signal. This may be followed by b) precomputing ancillary information relating to the compression of the transformed input audio. Next, the method may include c) mixing together the transformed input signals in the transform domain to produce an output transform domain signal. The method may then include d) algorithmically combining together the precomputed ancillary information to determine a suitable decompression strategy. Lastly, the method may include e) outputting compressed audio data comprising the output transform domain signal and the combined ancillary information.