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A wide-spread method for visualizing the spatial behavior of stereo signals is the vector-scope or goniometer which shows the relation between the left and right channel. Well-trained eyes can see misbalance and mono compatibility problems in these very fast changing figures. However, this analysis tool contains no information over time and no details can be seen. In this contribution the author introduces a new method for analyzing stereo signals, which is based on the vector-scope but shows the spatial behavior over time. The final graph looks like a spectrogram/sonogram, in which the axes are time and angle. The author calls this new tool the Spatial Distribution Meter (SDM). Useful applications of this new SDM are the analysis of stereo impulse responses, the shift of stereo base over time and the typical applications of a vector scope.