I'm a beginner at piano, and struggling to understand what I'm looking at here, and how to play it. I've bought and downloaded some piano sheet music from musicnotes.com. It's in 12/8 time, and part of it looks like this:
How am I to interpret the two-note chord I've circled in red?
As far as I can tell
- the note marked X is D below middle C,
- the note marked Y is A flat above middle C (where middle C is marked with a blue arrow), and
- the fact that they share the same stem in the treble clef suggests I should play them together with my right hand.
But that's really odd because (a) it would make more sense to write note Y on the treble clef itself, not on ledger lines above the bass clef, and (b) the interval between the two notes is a 12th, so the stretch is surely unreasonable for almost everyone.