
I pretty much always called it E-flat, regardless of context. Guitars don’t have black and white keys, so when I was a feral self-taught musician, I just thought of that note as the eleventh fret on the E string, the sixth fret on the A string, the first fret on the D string, etc. You could also think of it as a lowered E, in which case it’s called E-flat.

You could think of it as a raised D, in which case it’s called D-sharp. This confusion applies to all of the black keys, but in this post, I’ll be talking about the one between D and E. Why do the black keys on the piano each have two different names? If the posts on r/musictheory are any indication, this is a persistent point of confusion, especially when music theory teachers get all persnickety about using the correct name.
