12
votes
8answers
1k views

What makes an interval “Perfect”?

I've been trying to find an answer, but to no avail. Is what we call a perfect interval somewhat arbitrary? It seems as if the modern definition is "perfect under inversion". I know the other thing ...
8
votes
4answers
689 views

Why is a minor 3rd consonant but an augmented 2nd dissonant?

I am currently reading the Jazzology and on the chapter per the consonant and dissonant intervals I came across this statement: while a minor 3rd is consonant, an augmented 2nd is dissonant. ...
9
votes
1answer
373 views

Is i-V a stronger progression than I-V?

I'm just starting to learn a little music theory (in connection with learning to play the ukelele), and I repeatedly see I-V as basically the strongest chord progression (in whatever sense "strongest" ...
4
votes
3answers
166 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
4answers
307 views

Are doubly augmented and doubly diminished intervals practical?

In music theory when naming intervals, a lowered diminished interval is a doubly diminished interval (dd) and a raised augmented interval is a doubly augmented interval (AA). Ex a C# to a Gb would be ...
6
votes
3answers
562 views

How to differentiate between a diminished fifth and an augmented fourth interval?

Both are a tritone appart, both sound the same. How can we differentiate when an interval is an augmented fourth or a diminished fifth? Context: In voice leading we learn that when the spelling of ...
7
votes
5answers
190 views

Chords and Intervals - Unison

Just trying to wrap my head around intervals but I'm confused by Unison. If I am playing a chord on a piano, how do you play a Unison chord if you can't press the same key twice at the same time? ...
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 ...
16
votes
3answers
914 views

Why are thirds used to construct chords?

I am (slowly) learning music theory on the guitar. I've begun learning about scales and chords, and it seems that all chords are built using some combination of thirds. For example, a minor triad is ...
1
vote
1answer
196 views

What note(s) are a diminished 3rd above D-flat?

In What is the interval between Db and D# some of the comments indicate that the interval Db->Eb can be considered as a diminished third. I would think that Fbb (double-flatted F) is a diminished ...
12
votes
2answers
336 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
2answers
225 views

How do you label a sequential interval when the second note is lower in pitch than the first?

Consider the interval D3 G3. This would form a perfect fourth. In a sequential interval, say a quarter note D3 followed by quarter note G3, this still "sounds" like a perfect fourth so using that ...
9
votes
6answers
391 views

Can a chord contain both the C and C♯ notes? (as opposed to containing C and D♭ notes)

Can a chord contain both the C and C♯ notes? Or do you always have to use D♭ rather than C♯ in a chord that already contains the note C? I'm guessing the answer is no, both C and C♯ should not be ...
8
votes
7answers
3k views

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 ...
23
votes
6answers
2k views

What notes are optional in jazz chords?

I have a question on jazz chords, and what notes can be removed from the chord. My understanding is fairly superficial - mostly from what I've read in books. This is what I understand: In some ...
6
votes
3answers
256 views

What makes augmented fourths and the diminished fifths so hard to sing/remember?

I've always wondered what makes these particular intervals so difficult.