I'm trying to play some guitar/piano chord progressions for my daughter to improvise over using the scales she's learning on her alto saxophone and looking for some help.
I know that to transpose I play 3 half steps up from the note she plays on the sax. What I'm looking for help with is when she plays a minor scale. If she plays the E Minor scale on the sax do I go to the 3rd half step up = G and build a chord progression based on G Minor/BbMajor
Or would it be based on G Major/E Minor
Or something else entirely.
Pretty new to music theory and wanted to try and figure this out first before we tried to jam away together so any help is really appreciated