A New Way of Making Whistles? Bass recorders for squares

Made by Herbert Paetzold in Germany.
Craig Fischer has made square bore Irish pipe chanters. You can apply it to whatever woodwind apparently.

Shown above from left to right:
-F- Bass Recorder
-C- Greatbass Recorder
-F- Contrabass Recorder

From Susato’s website

Very very odd. Never seen anything like this before.
From the same family as these?

Those Paetzold square recorders are actually quite excellent. I saw the superb Amsterdam Loeki Stardust Quartet using one or two of them a couple of years ago and they sounded terrific-- sort of like organ pipes. The keys (also plywood) make a cool clacky sound and one of the modern pieces the quartet played actually used that clacky sound without blowing the recorders!

Edgar Varese’s Density 21.5?
He got the density wrong, apparently. (It was written for an owner of a platinum flute) It was said to be the first piece written to incorporate flute key noise.

I have a friend who owns a Paetzold Contrabass and it is one of the instruments that inspired me to make the basswhistle.