Rapid tarnishing
I play the flute a lot, I am very serious about this instrument, ive had this flute for about 3 months now and the metal on the headjoint has went through severe amounts of tarnish and wear compared to the body, even off the lip plating. I play a PFL665QZ flute and I originally had bought it, it was extremely shiny. suffice to say, I had put about 300+ hours of play time on this flute since I got it. would this need COA? also, lately, I’ve been trying to push my low register but it’s slowly becoming more difficult, I am trying to isolate a certain tonal colour on the instrument that’s loud, and dark, but every time I try playing very loudly on the low end, I receive a beating-esque noise. it’s hard to hear from a distance but you feel it when you play, and it only appears to go away after forcefully shoving the keys more ’in the tone hole’ per se. leak? Im not sure.