How Jacob Collier uses microtonality, pitch and temperament”, by Listening In.
The teacher here explains first the distinction between equal temperament (Bach) and “Just intonation” and “pure intonation”.
The video also shows microtonal notation (as double-double sharps, etc). I don’t know how Avid Sibelius or other systems (along with Notate Me, PhotoScore, etc) would handle this.
The result of this singing and performing style is a homey sound (like in a small chorus) that was actually popular with TV product commercials in the 1950s.
Aimee Nolte Music gives some more material on how Jacob’s system works with her pitch wheel and “Rudolf the Rednose Reindeer” as an example. One important point: microtonality invokes more than "quarter tones" of some composers like Haba who appear in modern music theory texts.For picture, click to see Wikipedia CCSA attribution for embed.