I'm not entirely sure whether this was intentional or not, but there is an 
block in the audio comp library that is not used at all any of the audio comp blocks.
I personally don't see much of a reason to include it, because it's not used in the library, and I don't think many people would even know what to use it for with audio samples.
Maybe for smoothing signals?
It's just the mean formula. I'm really just confused as to why it's even in the library, since it's not used. If it were for smoothing signals, I would assume there would be a block to smooth signals, which would use this block.
My guess is, there's some piece of curriculum made by Jens and Jadga about audio in which students have to use the average block, and so they give it to them in the library.
We could argue about whether it's right for curriculum needs to drive libraries, but this isn't the first time; there are libraries we added for BJC.
Oh, that does make a lot more sense.
actually, that average block somehow got into the library by mistake. Thank you, @ego-lay_atman-bay , for pointing this out! I'll remove it in this week's patch.