Gmin7 to Cmin7 - help me to understand this

[hardrock420]

Was messing around with a Gmin7 to Cmin7 progression just back and forth and I noticed that it was interesting theory wise. for the bass notes (played on guitar) I would hit the A# on the Gmin7 and the C on the Cmin7 with a G note between them. it seems like this progression doesn't technically have a root or a certain key, like the A# sharp feels like home but so does D# but waaay cheesier.

what scales/modes to play on this?

 

[matthew bear]

The a# (Bb) is your root note. Gm is your relative minor. Strictly diatonically speaking, that’s your base.

 

[matthew bear]

So, you are technically going between the 6th degree Gm and the 2nd degree Cm of the b flat scale.
The e flat is the 4th degree of the Bb scale.
For modal experimentations try F (the 5th) and see what you get. Hope that’s helpful!

 

[matthew bear]

Last thing

try throwing in some G7 chords as well, and use the C scale. It could get weird

 

[huw]

Gm7 = G Bb (not A#) D F
Cm7 = C Eb G Bb

Total note set = G (A - implied) Bb C D Eb F = G minor (natural minor).

You're playing the Im > IVm in G.

100% diatonic, the Bb note is just a good pivot as it's in both chords.

 

[hardrock420]

thank you guys

 

[cowsgomoo]

the reason why Eb also feels right as the tonic chord is that Gm7 and Cm7 are also in the key of Eb (in addition to being in Bb, as discussed above). They're the iii and the vi chords

There isn't enough information just in those two chords, to tie you to one key - it could be Eb or Bb, and the only difference between those 2 keys is what's going on with the A... in Bb it's A natural, Eb it's A flat.. The two chords provide you every note but the A... and that ambiguity is the reason why Eb AND Bb both sound like they could work

 

[VictorB]

I’d use G Dorian with the flatted 5th thrown in.

 

[cowsgomoo]

I’d use G Dorian with the flatted 5th thrown in.

I would like to hear some of that

The E natural in G dorian will need to be used carefully, given that Cm7 has an Eb...

 

[LPMarshall Hack]

I understand none of this

I’ll see myself out