In this music interview with Jacob Collier, Jacob gave an example of microtonal voice leading. The example song was Rudolph the Red Nose Reindeer, in C, specifically the ending of the song. He sang a minor third divided into 4 notes, which should normally be 3 semitones.
I immediately recognize this pattern, similar to which I have heard while trying to transcribe some songs in the past. The transcriptions were a failure, mainly because I was unable to find the right notes on a piano.
How do I recognize these microtonal notes/patterns in general?