Quote:


I have a song in Gm that I want to change to Gmaj for 8 bars & back to Gm.





Many jazz tunes modulate internally for several bars but it is not customary to invoke a keychange to do so. Accidentals are the norm here.

Typically invoked via the ii-V7-i change, these kind of modulations aren't notated as you would in Classical charts.

"Cherokee" (How High the Moon) is the outstanding example of such.



--Mac