Accidental in front alters the chord from its diatonic version.Can have any triad in any key as long as you know how it relates to the key.However, when we get past the Classical era this method breaks down because all kinds of crazy stuff starts happening with harmony from the Romantic era onwardĪltering Roman numerals for non-diatonic chord qualities Sometimes chords like IV7 are notated without the clarification that it’s a major seventh chord–you’re expected to know because a major seventh is diatonic.Can be altered with M, a half-diminished, or a diminished sign You can tell the difference from the half-diminished sign because the latter has a slash through it (it’s cut in “half”) The diminished sign is special because it indicates that both the fifth and seventh are lowered.5ths are assumed perfect unless there’s a +, a half-diminished, or a diminished sign in the superscript.Uppercase/lowercase identifies the third (major/minor).As we’ll see in a second, the root can be altered just like the other chord members For example, in C major vi indicates an A minor chord because A is the sixth scale degree in that key. You can tell what note the root is because its number correlates directly to its scale degree. The roman numeral itself identifies the root.We do not know what key we are in and how this chord functions within the key.Discussion 6a - Roman Numerals in Harmonic Analysis Class discussion

Sharpkeys how to set lower case