You might have heard the term the “brightness” or “darkness” of a scale/mode. Typically they are referring to how scales/modes containing a lot of sharp or raised scale degrees from the tonic are referred to as “bright” while those that have flattened scale degrees from the tonic are “dark”.
This is not to say that flat keys are “dark.” We are saying that the intervals that make up the scale that are flattened in comparison to the major scale tend to be more “dark” in tonality.
Can you change a scale to make it more “bright” or “dark?”
Essentially yes by either raising or lowering pitches in the scale (usually done in a circle of fifths pattern of selecting which pitch to alter).
This is good to keep in mind as you are writing and trying to find the right emotion and color to express your musical ideas. That might mean using an unconventional sale/mode or building one from scratch.
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