Originally Posted by: jarkko.eklund

Originally Posted by: Abadez
nice explaining.

but how about Minor chords formula? i knew that ( 1-4-5 are always Majors in Key majors.

But how about in the key of Minors? how is the formula looks like?

because, i am stuck with something.

Many thanks

There are three different minor scales: natural, harmonic and melodic.

A natural minor scale is "easiest" to derive from a diatonic major scale.

The sixth degree of major scale is a root of a relative minor scale.

If we look at the key of C major (-Dm-Em-F-G-Am-B° ) the 6th degree is Am. For the key Am we simply use the same chords, but start from Am.

Then the chords in A natural minor are
Am - B° - C - Dm - Em - F - G

So, the chord formula for natural minor keys is
i - ii° - III - iv - v - VI - VII

To convert a natural minor scale to a harmonic minor scale the 7th degree note of the scale is raised by a half step.
That 7th degree note is present in III, v and VII chords of the scale. Those chords must be altered.
The III chord now has a major 3rd and augmented 5th intervals, the chord is augmented III+
The v chord now has a major 3rd and perfect 5th intervals, the chord is major V
The VII chord now has a a minor 3rd and diminished 5th intervals, the chord is diminished vii°

The chord formula for a harmonic minor key is
i - ii° - III+ - iv - V - VI - vii°

To convert a natural minor scale to a melodic minor scale the 6th and 7th degree notes are raised by a half step.
We need to analyse all the chords, which have either 6th or 7th degree note.
The 7th degree note is the same as in harmonic minor.
The 6th degree note is present in ii°, iv and VI chords.
The ii° chord now has a minor 3rd and perfect 5th intervals, the chord is minor ii
The iv chord now has a major 3rd and perfect 5th intervals, the chord is major IV
The VI chord now has a minor 3rd and diminished 5th intervals, the chord is diminished vi°

The chord formula for a melodic minor key is
i - ii - III+ - IV - V - vi° - vii°


In major keys I-IV-V chords are major
In natural minor i-iv-v chords are minor
In harmonic minor chords are i-iv-V
In melodic minor chords are i-IV-V

Thanks a lot.

but as you said:

In major keys I-IV-V chords are major
In natural minor i-iv-v chords are minor
In harmonic minor chords are i-iv-V
In melodic minor chords are i-IV-V

so as i have come to undertsand that all of them are like ( 1,4,5) , it seems to be by converting romans numbers are all the same, which ends as (1,4,5), is that correct?

i tried to understand between the major and minor which is like this :

The major keys as we agreed should be (1,4,5), those chords should be Major. then i started to stair at the minor too and i come up with this:

for Minor keys for example ( B minor ):

Bm - C# Dim - Major - Minor - Minor - Major - Major

So, its some how related in the terms of the form.

but as my above question, can you explain why are these same?

In major keys I-IV-V chords are major
In natural minor i-iv-v chords are minor
In harmonic minor chords are i-iv-V
In melodic minor chords are i-IV-V

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one more question, im using a website to create music. but i kept looking for (Diminshed) chord. i couldnt find, i found only Bb. is diminshed means the flat?

and thanks a lot in advance.