I'm trying to learn playing recorder using plastic Yamaha YRS-302B - and there is a somewhat annoying thing: lowest notes
D are somewhat unstable - they sound properly only when I blow very softly. Just a bit more air - and they yield shrilling pitch about octave higher. So I could not play them as loud as others.
So I wanted to ask whether there exist some description of
know-how to play this two lowest notes properly - I suppose there could be something wrong with how I breath or like this.