i got a new sop. saxophone a awhile back and i noticed recently that the regular G,A,low F and sometimes the other lower notes don't play right and i can only get them to play up an octave. I can play the upper octave fine. Should i take i to the shop and get it looked at? or a m i just rusty after having switched to the violi for the last 2 years? (i used to play sax in band) PLease help me!