[Bruno Travi]

Yesterday I bought the M-37C Plus and today returned it, the reason? many notes and octaves out of tune !!
I share the brochure:

Alan, you are “The Melodica Encyclopedia Man” I have two questions:
¿What is the difference between “tapered reed” vs “Reed”?
¿What is the difference between M-37 (1977~1999) and the M-37C? ¿The reeds?

Thanks

Bruno