Soft dB OBSI Software User Guide - Manual (Page 15)

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The bottom left slider applies an additional gain to the operating system volume control and the
bottom right vertical scales represent the audio dynamic ranges.
4.1.4 Main Time Axis
The main time axis represents the whole measurement time range. Two cursors allow the selection
of a certain portion of the measurement to perform averaging and a third cursor represents the
current audio position during audio playback.
Clicking on the graph button on the right side of this axis displays the main time history which
shows a time history of a selected data source, such as averaged sound intensity or vehicle speed.
The source data can be selected from several choices on the Display Setup interface (4.5.2).