Recorder Extended with Bb Hole - includes Fingering Chart

Remixed from Recorder v2.3 by cymon: https://www.thingiverse.com/thing:12862

Update 2021-05-17: Minor fixes to the foot and second segment. Adjusted the sizes of the low B/Bb holes for better tonality (the low B natural was formerly too sharp). Increased the height of the ridge for easier playability.

This is an update of the classic soprano recorder in C. It has an extra double hole to play a half step or full step lower than the traditional instrument, without having to obscure the bell. The new hole also works in the upper register, allowing the range of Bb to high C, although the highest notes require more breath pressure and will sound loudly.

Demonstration here: https://youtu.be/iD4_P0DqAaU

To play, you'll want to use all digits on your left hand and four fingers on your right. The only learning curve is playing F now involves lifting your index, not middle, finger, and changing from F to G involves moving both hands. The extra protruding hole at bottom plays low B if half closed (and all other holes closed) and low B-flat if fully closed. There's a resting notch for your right thumb for optimal hand position.

If printed in PLA, the tone will be warm, woody, airy, and flute-like, especially in the lowest notes. PETG gives it a clearer, somewhat brighter tone, but still very definitely a flute sound. I do not recommend ABS as you want maximum layer adhesion and ABS is $#!+ for layer adhesion.