It was a funny afternoon of visitors in my piano shop.  One such visitor was a friend of mine… another guy named Glenn (although i keep reminding him that 2 ‘n’s are redundant… but then again, i named my youngest son Quinn…)  ANYWHOOOO… he comes in, sits down and states “Glen… i have a REALLY hard time reading information from piano ‘authorities’ when in the first paragraph, there are GLARING errors. It’s rubbish”.  Now you have to bear in mind that most of my friends are critical thinkers.  Glenn is no exception – structural engineer by trade but also piano lover.  He continued “I was reading from a leading expert who was writing about piano soundboards being under tension”.  Me being the non-intellect of my friends… i get dragged by my collar into such discussions… i’m a little slow to the draw and reply… “Ya… uh huh and your point?”  (I’m surprised he didn’t have my head at that response.)  “Glen think about it!!!  Tension by definition means to pull apart.  Take a rubber band. Stretch it apart. THAT’s tension.  Compression means pushing together.  He held one of my business cards bending it slightly – THAT’s compression.  It’s ridiculous that a soundboard would be under tension… it would be KINDLING! Pull apart a soundboard??? Pianos aren’t under tension at all… they’re under compression.  The Roman arches were designed with compression – pushed together”.  After thinking about it for awhile i recognized how he was right.  Piano soundboards are compressed – slightly arced with a crown.  The more i think of that concept, the error in logic almost seems humourous.  We’ve somehow slipped into bantering terms about that incorrectly define the piano.  We then have a scenario of the blind leading the blind don’t we? When the so-called experts are educating their followers down a slippery slope.  Starts to make one wonder however as to the validity of other information given. Just sayin’.