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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17
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2answers
2k views

Why do notes have multiple names?

I've seen the same note called different names for example the note F# can also be written as Gb. Why is this the case and are there times to use one name over another?
18
votes
11answers
7k 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 ...
5
votes
3answers
483 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 ...
2
votes
9answers
7k views

What is a perfect fifth?

I have gone through many documents, but don't understand what a perfect fifth is. Can somebody please explain with an example? (An example is important!) I have already found these explanations, but ...
16
votes
9answers
1k views

Musical Aids to Memorize Intervals

As the tutor for my school's music department, I spend a lot of time helping students drill intervals. However, I only have a handful of songs to recommend recognition. P8 — Somewhere Over the ...
8
votes
3answers
4k 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, ...
18
votes
5answers
3k 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). One example is a C♯ ...
17
votes
3answers
3k 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 ...
7
votes
5answers
3k 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 ...
2
votes
2answers
423 views

Naming Scale Degrees

As I understand the minor pentatonic degrees are 1 b3 4 5 7b It says b3 & 7b, does it matter which side the b is on and do they both mean flat? Scale degrees are almost always based off the ...
13
votes
9answers
6k 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 ...
10
votes
3answers
763 views

What are some useful ear training exercises for moving beyond two-note interval training?

I've practiced enough that I can recognize two-note intervals in isolation (sequentially), but this doesn't seem to help that much for understanding actual songs. What exercises would help to go ...
15
votes
2answers
584 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.
18
votes
11answers
947 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 ...
9
votes
5answers
7k 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 ...
4
votes
8answers
4k views

Confusion about major and minor second intervals

Why is a major second interval different from a minor second interval considering that in the natural scales formulae they are both one whole step?
3
votes
3answers
399 views

Is there a simple way to transpose a song from one key to another? What is the methodology?

What is a simple way to accomplish transposing a song from one key to another key? In other words if I am looking at a song written in the key of C and can't sing it in that key and I want to ...
11
votes
6answers
322 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 ...
3
votes
4answers
1k 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 ...