The following graphs are sonitypes (archetypes of basic sound
representations of data) of different graphs. The graph's X axis is always
represented by time in these sonified graphs. The Y axis of the data point is
represented by the pitch of the piano instrument. The first and second derivatives of the data
are represented with the drum beat. The frequency of the beat represents
the slope (so the greater the slope, the more frequent the beat.) The second
derivative is represented by the pitch of the drum beat, a low pitch indicates
positive curvature (concave) and a high pitch indicates negative curvature
(convex); Linear data is indicted with a medium pitch.

The data set from which the visual and auditory graphs were drawn, can be
accessed by clicking on the visual graph.

Negative data values (or Y axis values below a set-point) can be represented by changing the voice of the instrument; say from a piano to harpsichord or other tonal quality.

Here is an example of an audio graph of the function Sin(x). In this graph, the data, first derivative, and negative auditory indicators can be heard. Download

Error bars on data sets can be represented by a white noise indicator, where loudness indicates the size of the error bar. Another method to indicate error on sonified data would be to introduce higher-order harmonics into the instrument's voice, thus delocalizing the pitch.

Here is an example of data with increasingly large error bars: Download

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