The name given to the distance between two pitches. Can be expressed in terms of relative scale degrees (minor 3rd, tritone, unison, octave) or exact ratios (3:2, 16:9, 5:4).

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What is the full list of possible chord names? Are there chords that don't have a name in chord theory?

My chord book covers 35 different chord types. When I look on the web or in other tools, all the same types of chords come up. But I don't think this is the "full" set of possible chords. I'm not ...
6
votes
2answers
2k views

Exercises for quickly identifying intervals on the staff

In order to improve my piano sight-reading, I want to practice recognizing intervals on the staff faster. If possible I'd like to combine the interval-recognition with a training for my finger memory, ...
12
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2answers
315 views

What is the name of the interval Db - D#?

I know that Db - Eb is a major second/diminished third. What is the interval Db - D# called (and why)? EDIT: oops, Db - Eb is NOT a diminished third.
4
votes
3answers
164 views

General procedure for determining the name of an interval given a major key / diatonic collection

I'm attempting to program a library that lets one make use of concepts from Peter Westergaard's tonal theory. The current problem I'm trying to solve is to determine the specific name of an interval ...
10
votes
6answers
169 views

Why aren't intervals zero-indexed?

Note: italics such as "2nd" refer to my proposed notation; existing notation is written without italics: "2nd". Why is the interval between C and D called a 2nd, as they are 1 note apart? Surely this ...
6
votes
4answers
1k views

Does the bass note in a “slash” chord really have an associated interval?

I have a question about "slash" chords. Look at the chord E/G: E G♯ B G 1 3 5 ? G is the minor 3rd interval (♭3) in the key of E. However, I would have thought by definition chords cannot ...
0
votes
3answers
680 views

Theory of Major and Minor Chord Sounds

Since a major triad is comprised of a minor-third stacked on top of a major-third, and a minor triad is comprised of a major-third stacked on top of a minor-third, they should, in "theory", have the ...