Oh come on, you sound like knackered old record.

In case you don't get it: Nobody knows exactly how it works. The manufacturer claims it does something to air particles to positively affect sound traveling through it. Since Pete hardly wants to chop up the unit and try to reverse engineer it he tests if something is going on with the air and does so with smoke. What does that have to do with improving sound? Well you can make educated guesses but more importantly I've seen a over five first hand reports from people other than Pete who flat out said it does have a positive effect.