You’ll notice that there aren’t any black keys between B and C, nor between E and F. These natural notes are only one semitone apart, while the rest are a tone apart. F sharp and G flat are "enharmonic equivalents". An enharmonic equivalent is simply another way to "spell" the same note. Compare the sound of C+E+G+A#-> B+D#+F#+B and C+E+G+Bb-> C+F+A on a piano, and you'll hear a clear difference in the two otherwise identical intervals. That is, each time we travel twelve notes in either direction for an enharmonic note-name, we must add one comma to get to the next layer. Enharmonic Equivalents. They Were MEAN and HARSH to Him, but He Came Back to PROVE THEM WRONG!

This would be the type of situation when an Enharmonic Equivalent comes in handy. A# and Bb are the same note; C# and Db are the same note; D# and Eb are the same note; F# and Gb are the same note; G# and Ab are the same note; The A#/Bb enharmonic is between the A note and the B note.
There are two definitions of the phrase "enharmonic equivalent", referring to the enharmonic equivalent of a single note, or the enharmonic equivalent of a key, or key signature. Take a look at the notes of the F major scale: F G A Bb C D E. In this example we use Bb instead of A# because there is already an A note in the scale. Enharmonic equivalents are often used when we change key within a piece.

Thus, the enharmonic spelling of a written note, interval, or chord is an alternative way to write that note, interval, or chord. The notes to the left of E-flat are all one comma too flat, and the notes to the right of G-sharp are all one comma too sharp.

Enharmonic notes explained. This is mainly used in music theory, because each note (with or without accidental) should only appear once in a scale.

Here is a handy guide to the intervals of all twelve keys. The Solution below shows the G# harmonic minor scale notes, intervals and scale degrees on the piano, treble clef and bass clef.. The Wonderful World of Enharmonic Spellings. Historically, B#, C and Dbb were three different pitches. Some common enharmonic equivalents are C#/Db, D#/Eb, G#/Ab and A#/Bb. Notes of matching pitch which can be written differently, such as A# and Bb. These are the black notes on a piano keyboard. The Enharmonic Notes (sharp): A# C# D# F# G# . Sharps, Flats, and Enharmonic Equivalents Now that the National Spelling Bee is over for another year I felt compelled to address one of those odd little topics that makes life interesting if you’ve been a crazy musician all of your life and see whether I could take the rest of you along for the ride.