mxj~ equivalent to line~

Hey folks,
Im working on an ambisonics patch which Ive had some nasty distortion after processing. Thanks to Jan the problem is solved thanks to a well placed line~. Now I need to translate that to an mxj~ object Ive written. Here is the solution to the problem in a patch. The coloured part is what I need to add to my mxj~ object.

Im a complete beginner when it come to java (I honestly have no idea how I managed to translate most of this patch to mxj). I just need to know how to perform the smoothing function of this message/line~ within my mxj~ object.

Thanks in advance,

Mick