[tln]

Are you trying to get a ligature that crosses lines?

You could maybe try U+2303 (⌃) for the up arrowhead, but why not just use U+2191 (↑) for the standard arrow?

The crossbar height of lowercase letters is not a common typographical reference point...

[o11c]

I don't care about ligatures, just symmetry.

[michaelcampbell]

That's fine I guess. Some audiophiles don't care about music, just sound.