Posted by:
WaltP
(---.pghkny.east.verizon.net)
Sounds like possibly a stuck windsaver, it usually happens on a blow note as the moisture of your breath makes them adhere to the reed plate. Also, there are two parts to the windsaver and if moisture makes them stick together they'll make a sort of squealing sound. I often get the popping sound, especially if I don't warm the harp before I play it, it goes away with continued playing.