Walking around the grounds of Uppark, the trained ear of @mostlyscarce picked out numerous bird calls, which I am going to use as my raw material. Each call, when you listen to it carefully, assumes a ‘shape’ in your mind, its shifts in pitch and amplitude creating a mental image of the song that goes way beyond what you actually hear. But just as most of taste is in fact smell (try tasting something when you have a cold), so hearing is never independent from vision. This is where it gets interesting. Once the bird calls are converted into 3D forms in the computer, ready to be worked on visually, then I can starting sculpting in sound. Thanks @UpparkHG and @mostlyscarce for all your help with this.