I Need Help with Chord Progressions
 

Good day to anyone reading,

I have a quick question before I attempt to improvise over a solo section in a piece of music i'm performing at a jazz concert tonight. FYI, I am a trombonist.

The most common chord in the piece is G7 which traditionally has G,B,D,F as the 1st 3rd 5th and 7th. HOWEVER, the pianist in the group is playing B flat instead of B natural and I don't know why. Is this some kind of variation, and if so, what scale does it use? I'm thinking G minor but that doesn't sound right, and it would be G MAJOR, but the B flat is screwing that idea up too!

Any comments appreciated.
Thanks

E minor

E minor?

I would post a pic of the solo section but it's not letting me. It's basically just your standard jazz improv sheet in music with G7 Above most the measures. Also has C7, A7, and D7(#5)

The pianist is throwing a minor third at you so yeah

Don’t **** around with G major you’ll sound weak

What should I do instead?

Here's the picture by the way

Those are the chords the pianist will be playing while you improvise on top of it and you’re asking what scale to use?

Yes, I apologize for any of my ignorance on this topic. While I have been playing jazz for a few years now, I am still very new to improvising and music theory in general. This piece tonight is also considered to be our hit, so I just want to do it right.

But yes, if you could tell me what scale would be good, as well as any tips for it, I would appreciate that a lot.

I mean, I think e minor with a lot of accidentals would sound hot but it’s up to you

I don’t think there’s a definite right or wrong answer

Okay, I'll probably just try warming up to the backtrack of the song with that then and see how it goes. If your curious and/or could provide more info if you heard the song, you can search "Arnge Drank" on youtube. First thing that comes up is it. Solo section starts at 1:25