I tried Effexor and had the same problem with my pre-existing tinnitus screaming at me while on it. Same issue with half a dozen other drugs I tried too: https://mvertigo.org/t/vm-diagnosis-but-all-the-drugs-make-my-tinnitus-worse/.
I tried 12.5mg for 10 days, and couldn’t tolerate it any longer (just got too loud for me).
Did your tinnitus go back to normal at all at any of the dosages you’ve been on?
Good luck. I hope it works out. Keep me posted!