In some older tuning systems, Eb and D# may differ in pitch.

In some older tuning systems, Eb and D# may differ in pitch.

• A. No
• B. Always true
• C. Yes
• D. They are always identical

Answer: (C)

In older tuning systems, not all semitones are the same size, and enharmonic spellings aren’t guaranteed to land on the same pitch. The distance between notes depends on how the temperament is built and how accidentals are tuned to fit other intervals. Because the chromatic semitone (like D to D#) and the diatonic semitone (like E to Eb) can differ, the pitch you call Eb may not equal the pitch you call D#. In these temperaments, those two spellings can end up at different frequencies, so they may differ in pitch. That’s why the statement can be true in older systems. In equal temperament, they would be the same, but older tunings often break that equivalence.

In older tuning systems, not all semitones are the same size, and enharmonic spellings aren’t guaranteed to land on the same pitch. The distance between notes depends on how the temperament is built and how accidentals are tuned to fit other intervals. Because the chromatic semitone (like D to D#) and the diatonic semitone (like E to Eb) can differ, the pitch you call Eb may not equal the pitch you call D#. In these temperaments, those two spellings can end up at different frequencies, so they may differ in pitch. That’s why the statement can be true in older systems. In equal temperament, they would be the same, but older tunings often break that equivalence.