Returns the full note name with octave for a step offset from A4 in 12-TET.
Integer semitone offset from A4 (A4 = 0, C4 = -9).
If true, uses flat spelling (e.g. Bb instead of A#).
Note name with octave, e.g. "C4", "Bb3".
"C4"
"Bb3"
Returns the full note name with octave for a step offset from A4 in 12-TET.