Exploring Modulation

[@markguitarman]

When we move from Em9 to F#7b9b13 , and change the name to Gb, don't we need to call Bm9 Cm9 ??

[@ArcitecAudio]

Hey Mark! Thanks for the question! So theoretically the movement from Em9 to F#7 could be considered a I minor that goes to the II secondary dominant, meaning that it would be correct to say F#7 instead of Gb7(in the video I mistakenly said Gb7 and wrote it haha..ooops! :). This is also the case if we look at Em9 and F#7 respectively as the the IV minor and V dominant in the key of B minor. As to the part about why this would relate to calling Bm9 = Cm9. I am little confused and would just ask you to clarify a bit further! Perhaps I am not fully understanding what you mean! I am more of a practical musician than a theorist( I do love theory) but I try not to get caught up in enharmonics and the details of it. Apologies if it caused some confusion however the proper way to think of it would be as an F#7 and not as a Gb7. hope this helps :)