How can you tell what key a melody is in if it uses notes found in multiple scales? And if a note is introduced from a different scale than the one it was in, does that change the key? What if it only plays 2 or 3 notes from the new scale? How many notes must a key be to actually make it a key and not just random intervals?
Teaching guitar from beginner to pro using my own unique methods
Songs or passages of songs can have what we call key centers. Consider you are in Tampa, but you are also in Florida , and you are also in the U.S. So a song can be in D and have parts in Bb or A minor.
The song will always be in D and how many notes until it changes is up for discussion, for example how many brushes of red paint on something blue until we then call it purple?
Finger Picking & Flat Picking Guitar Teacher with 40 Years Experience
Hello, the key is contained in the key signature shown in the treble clef. The key remains the same even if the melody steps out of the key from time to time. To better understand key signatures please google the Circle of Fifths. The chart shows the symmetry of key signatures. The key of C, or its relative minor of A, has no sharps or flats so there is no notation by the treble clef.