1. A method for execution by an audio encoder comprising at least one processor coupled to at least one memory including computer code for one or more programs, wherein the method comprises: determining at least one set of parameters defining a difference between at least two audio signal channels; scalar quantizing the at least one set of parameters as symbols; analysing the symbols of the at least one set of scalar quantized parameters to determine trend; mapping the symbols of the at least one set of scalar quantized parameters according to a first mapping to generate mapped symbols with an associated symbol order position based on the trend; and encoding the mapped symbols based on the order position of the mapped symbols.