One of many reasons music theory and acoustics are
valuable fields of study is because each of us who plays and sings and writes
and studies music will often have conceptual constraints we may not be aware of
as we are beholden to the limits of what our bodies can do and perceive and (crucially
for those us who play instruments with fixed tunings, keys and frets) the
in-built conceptual and physical constraints of the instruments we play.
Ethan Hein, a music theorist who is (like me) a
guitarist, describes how D sharp and E flat are different; why they are
different; and how guitarists can sometimes not fully or immediately appreciate
the distinction.
If memory serves there are now microtonal fingerboards for guitarists who want to be able to play the difference between D sharp and E flat. John Schneider shows samples in the updated and revision edition of The Contemporary Guitar, which is a beauty of a book you should pick up if you’re a guitarist of any style or instrument. If you want to see what such a fingerboard looks like on a real guitar Paul Davids (with Adam Neely as guest) has a video for you.
But it’s been in the last half century such
innovations have come about and they are generally only known to guitarists who
want to play stuff by, say, Alois Haba (who wrote a suite for guitar
in quarter-tones). It has a teensy
bit of an Ivan Wyschnegradsky vibe for me … .
Haba also wrote a guitar
sonata.
But for those of us who don’t play microtonal
guitar music, D sharp and E flat are totally the same. Which is a reality Ethan
Hein notes in his post.
http://www.ethanhein.com/wp/2022/why-are-d-sharp-and-e-flat-considered-to-be-two-different-notes/