These files are digitized versions of a combined auditory and visual data representation that 
we made ca.1980 at Exxon Research and Engineering Company. If you can download the highest 
quality (around 30MB) great, otherwise the smallest is around 4MB.

Each set contains a complete display, as well as three snippets to help illustrate how it's 
constructed. The data are economic indicators from 1948-1980. Train yourself on the snippets 
and then see if you can find that period in the complete data set.

The visual display (which didn't digitize well from old videotape) uses color to distinguish 
variables. A pair of lines corresponds to each variable, and their movement simulates movement 
toward you as the value increases. In the studio this happened with the audio too, using 
quadrophonic sound. The auditory display uses pitch to represent value. What seems like rhythm
is really an artifact of the fact that there was no attack or decay, so if a value didn't change
much from tic to tic, it sounds as if it is sustained.

This display was realized, pre-MIDI and pre-SoundCard, using a Digital Music Systems DMX-1000
connected to a DEC PDP-11/60, which also hosted a DeAnza Image Processor with 1 MB of memory (!).

This work was reported in:

	- Dynamic Visual and Auditory Representation of Multivariate Time Series
	  S. P. Frysinger and J.J. Mezrich. In M. Lynch (Chair), New Graphical Methods in 
	  Statistics - Special Session of the 1983 Conference of the National Computer Graphics 
	  Association, June 1983.

	- Dynamic Representation of Multivariate Time Series Data.
	  J.J. Mezrich, S. P. Frysinger, and R. Slivjanovski. Journal of the American Statistical 
	  Association, Vol. 79, No. 385, March 1984.

Enjoy!
Steve Frysinger