+=~ adds all the values it receives. The result can grow very large, very fast.
Sets the initial value for the sum. The default is 0.
Common Box Attributes
Resets the sum to 0.
The word, followed by a number, sets the stored value to that number, without triggering output.
Each sample of the input is added to all previous samples to produce a running sum. For instance, assuming the sum started at 0, an input signal consisting of 1, 1, 1, 1 would produce 1, 2, 3, 4 as an output signal.
Each sample of the output is the sum of all previous input samples.