Thelonius Monk - Straight ,No Chaser

Over in the Music section someone asked about recordings with true imaging . I posted about Thelonius monks straight no chaser album . The specific track I would like you to listen to is - Between the Devil And The Deep Blue Sea . Pay close attention when the piano comes in . The player swipes their hand across the keys from low to high . You should be able to get a sense of the size of the piano if your speakers are far enough apart . If they are too close it will not be lifesize . Now that I think about it , most pianos are similar in size (5 feet wide) ,could this be a guide as to far apart one should have their speakers ? if we know the piano is indeed 5 feet you should be able to marl the location of the first key strike to the last key . Just curious .Please discuss