Ofcourse the greats like brecker could pull of multiphonics and make it sound cool, but does it cheapen solos for younger players? One of my frends stayed away from a squeak (we played Sussudio by Phil Collins, in the recorded version Albright does some alitisiimo and my friend had it down!, excpet for that he was playing tenor not alto) in a solo becuase he felt people might not think of it musically, and just a mistake or a really abd effect. In my opinion hey work perfectly fine in moderation and at the right time. Should younger players (maybe HS kids) stay away from these sorts of things, or are they fine to put in a solo without people wondering why he or she did that?