Why are there no black notes in these gaps?

Why is there no black note between B and C or between E and F? Well, this is a simple sounding question with a not very simple answer. You’ll need to be sitting up in your seat for this one! My video on Microtonality: My video on 12-tone Equal Temperament: 📌This video is a revised re-upload. I originally uploaded this video in April 2022, but soon realised from the reaction in the comments that I had skimmed over a lot of detail when it came to the major scale and the tones and semitones. This was causing confusion for many viewers so I’ve now decided to replace that video with this new, updated version. I’m much happier with the explaination in this video. Sorry again for any confusion caused by the original edition. You can still view the original version if you like here: And, an extra special thanks goes to Peter Keller, Douglas Lind, Vidad Flowers, Ivan Pang, Waylon Fairbanks, Jon Dye, Austin Russell, Christopher Ryan, Toot & Paul Peijzel, the channel’s Patreon saints! 😇 SUPPORT ME ON PATREON: 🎹 SOURCES: Early Music Sources - Musica Ficta: Early Music Sources - Gregorian Chant: Early Music Sources - Solmization: Early Music Sources - Modes: Adam Neely & the tritone: Adam Neely & the tritone (again!): The Hydraulis: 12Tone - Why do notes have names?: The oldest playable organ in the world: The Halberstadt organ: History of the organ: Cantus Firmus: Baroque/Music/ Plainchant: Accidentals: History of Harmony: The Hexachord: