Second go again at posting this so to cut a long story short I was recording last week and I used a guitar tuner, via a mic, to get right. I played F sharp and looked for A on the tuner. Not very positive. In the upper octave it was not too bad so I reckoned I could play it in. When I checked the lower octave it was well flat. I played the piece anyway, sounded ok to me, but though I can tell if the music is working, when it comes to tune up, I find it hard. I have a couple of play along discs that give tuning notes but I am never sure I am spot on. This happens on guitars but you can adjust it. Cant see that it should happen on a sax. How do you tune up.