I used Cb for that pitch when it was part of the Db7 chord because it's intended to be the minor *7th* of the chord, and C is *7* letters above D. Since D to B is only 6 letters, technically a B would instead be an augmented 6th with respect to Db. In other words, we try to spell our notes in such a way that honors their function/context. While it may seem arbitrary at first, holding oneself to this standard really ends up making things more organized and sensible in the mind!

That said, there is still an argument for using B instead of Cb here, which is that we're ultimately still in the key of C Major, in which B makes a lot more sense than Cb. Sometimes there are competing contextual forces at play and you just have to make a choice. Here I chose to favor the context of the chord of the moment above all because this video is really about the chords mostly

@@MusicWithMyles OK, thanks for the easy to understand explanation

LOL that's a new one. I can see it 😂 cheers buddy

You should generally avoid consecutive perfect consonances in situations where you intend to maximize the sound of "independence" between voices. Here, we're going for the opposite - a bunch of voices blending together to highlight a single melodic line - so parallelisms aren't of concern. Lots of confusion around this "rule" from classical theory; maybe I should make a video on it

@@MusicWithMyles Yes I've noticed that some styles seem to ignore this convention. The "drop 3" styles etc. from big band music do too, so the music sounds more like a chorus than other styles. Also some guitar music styles seem to rely heavily on power chords which also do this. It's always bothered me because the few teachers I have had have drummed the no consecutives rule into me to the point that I'm actually uncomfortable if I break it myself. I think this has led me to disregard the genre of the music, which is probably as bad a mistake. Not everything is counterpoint. Thank you for your response. I'll watch pretty much any of your videos from now on because of your clear and practical style. Thanks again.