I’ve never made a Recorder, but I’ve been making sting instruments for nearly 40 years. Without overloading the answer with Physics jargon, the ‘voice’ of a Recorder (after the skill of the maker creating windway and labium) is primarily influenced by the density of the wood or plastic. (‘density’ measured as “specific gravity” – weight of an amount wood compared to the same amount of water) After that comes the thickness of the walls of the Recorder. I’ll stop there, but I am a pedantic old guy in his 70s, available for endless discourse on things I may and perhaps may not know anything about. – k –
