I went to purchase an alto (Yamaha 82Z or Mark 7) from a very respected dealer. I am trying them out and he pulls out a tuner. I get in tune for middle A and Bb but when I go up octive I am way off. I use a Morgan EL 8 mpc, he hates it. I try out a Ponzol 85..still out of tune. He gives me a Myer 6 to use then a SR Legend. I can't play in tune. He won't sell me a horn until my teacher comes in with me. My teacher is on tour. At home I am using a Cannonball alto and the same problem: get A then higher A is 20 cents off, and so are most other notes, plus or minus a dime or two.