Animates shape data from a Shape Table by Source name. During shape animation,
Source names are entered into the Acoustic Source column in the DOFs spreadsheet.
Shape data for all M# s having the same source name is replaced with the sum of the data for those M#s.
Summing data from the same Source shows the relative strength of shapes from multiple acoustic Sources during shape animation.
NOTE: Shape data for M#s with no Source name is not summed together.