DreamTheaterForums.org Dream Theater Fan Site

General => Musicians => Topic started by: nobloodyname on February 14, 2024, 02:30:03 AM

Title: Non-muso muso question
Post by: nobloodyname on February 14, 2024, 02:30:03 AM
Just wondering if someone might be able to explain what's going on here!

Standard chord sequence on guitar: Am, G, F, E. My research leads me to believe this is the key of A minor. I've been playing the A harmonic minor scale over it. I've noticed that if I play G# from that scale, it sounds really quite dissonant when it's played on top of anything other than the E. Is this working as intended, ie a 'feature' of the harmonic minor?
Title: Re: Non-muso muso question
Post by: Indiscipline on February 14, 2024, 03:07:23 AM
Let's put it this way:

Am, G, F are chords built on the notes of the A natural minor scale (i.e. the C Major Scale): A, B, C, D, E, F, G

When the progression goes to E, it's borrowing a dominant chord (parallel sostitution) from the A harmonic minor scale, which features A, B, C, D, E, F, G#

So, if you are constantly using the A harmonic minor scale, G# is a chord tone only on E, hence a reliable note to lean on melodically, while on the other chords it tends to sound "better" as a quick passing tone.
Title: Re: Non-muso muso question
Post by: nobloodyname on February 14, 2024, 03:23:36 AM
Ah, that's brilliant, thank you! So if I played the A natural minor scale, everything would sound fine.

...and I've just realised that it would be Em in the key of A minor, not E major. Ooops! But the E major sounds really nice :biggrin:

Title: Re: Non-muso muso question
Post by: Indiscipline on February 14, 2024, 03:28:09 AM
Ah, that's brilliant, thank you! So if I played the A natural minor scale, everything would sound fine.

...and I've just realised that it would be Em in the key of A minor, not E major. Ooops! But the E major sounds really nice :biggrin:

"Sounds fine" is totally up to you, mate. Those are explanations to things happening, the only rules are what you like to play!
Title: Re: Non-muso muso question
Post by: nobloodyname on February 14, 2024, 03:44:05 AM
Indeed. My issue was the E being of major variety rather than minor variety, just because I thought it sounded good* in the sequence. So it's either switch that E major to minor and use the natural minor scale or keep the E major and save that lovely lingering G# for when I'm on the E major.

No idea how on earth you and others remember all this stuff. Music theory knowledge always impresses me!

*and there's nothing wrong with that, I know
Title: Re: Non-muso muso question
Post by: Indiscipline on February 14, 2024, 03:47:20 AM
Indeed. My issue was the E being of major variety rather than minor variety, just because I thought it sounded good* in the sequence. So it's either switch that E major to minor and use the natural minor scale or keep the E major and save that lovely lingering G# for when I'm on the E major.

No idea how on earth you and others remember all this stuff. Music theory knowledge always impresses me!

*and there's nothing wrong with that, I know

The E major sounds great in that progression, why changing it?

Now that you know the way it works, you can switch the scales you use on the various chords - or pick/omit key notes in your favourite scale accordingly -  as you see fit.
Title: Re: Non-muso muso question
Post by: Lonk on February 14, 2024, 06:16:51 AM
Indeed. My issue was the E being of major variety rather than minor variety, just because I thought it sounded good* in the sequence. So it's either switch that E major to minor and use the natural minor scale or keep the E major and save that lovely lingering G# for when I'm on the E major.

No idea how on earth you and others remember all this stuff. Music theory knowledge always impresses me!

*and there's nothing wrong with that, I know

The E major sounds great in that progression, why changing it?
Not only does it sound great, it would be "proper practice" to have an E major (or dominant) go to Am, if the E major represents the end of a period or phrase.