1. A joint data sonification and visualization method for representing a first plurality of channels of numerical information via data visualization and a second plurality of channels of numerical information via at least one audio-frequency waveform, the at least one audio-frequency waveform perceived by a user as an audio tone with a plurality of corresponding discernable timbre attributes, further employing spatial sonic rendering, the method comprising: receiving multidimensional numerical data; generating a plurality of audio-frequency waveforms, each of the plurality of audio-frequency waveforms comprising an associated fixed audio-frequency and at least one adjustable timbre attribute responsive to an associated timbre control parameter, each timbre control parameter having an associated adjustable value which can be discernibly varied within a timbre space occupied by the plurality of audio-frequency waveforms; associating aspects of multidimensional numerical data with the at least one timbre control parameter of at least one of the plurality of audio-frequency waveforms from the plurality of audio-frequency waveforms; and adjusting the adjustable value of each timbre control parameter responsive to an associated first value of the multidimensional numerical data according to a mapping function, the mapping function transforming first values of the multidimensional numerical data to values of associated timbre control parameters, wherein timbre and spatial location of the at least one of the plurality of audio-frequency waveforms carries information responsive to the first values of the multidimensional numerical data for presentation as data sonification to the user, and wherein at least a portion of the multidimensional numerical data is provided to data visualization software.