It should be "Trippin"...

I found this article to be quite confusing, seeing as its entirely about sound. Its the same as trying to describe a dance...it can never fully be felt, because that is why they danced it in the first place. Because it isnt SUPPOSED to be said, therefore trying to say it goes against the whole point. On the other hand, describing how something sounds is quite difficult, though I praise the author on a worthy attempt.