123.109Example inner semitone in E major

Maybe:

A → A♭? Correctly G♯ context depends on function.

Let's choose:

A → G♯.

Could support:

A major → Am? Wait, in E major A→A minor changes C♯→C, not A. Better principle should be voice line.

Suppose inner line:

C♯ → C → B.

Then possible:

A → Am → E/B.

The chromatic descent:

6 → ♭6 → 5.

Same deeper principle.