Hi Damir and Peter - thank you for your replies. I play instrumental music (electric guitar) with backing tracks. The reason for different EQ setting is that I have different speaker setups for different size rooms. I use QSC K10's for larger rooms. They are heavy and I try to lighten my load. BTW, I use Fractal Audio FM3 modeler and not traditional guitar amps. so I mix guitar and tracks. I recently purchased Redsound Elis.8 FRFR speakers that are highly regarded in the modeling realm. They are smaller and lighter and fit the bill for that. However, they don't have the same sound as a PA type speaker and require especially more low end added. ST3 does have the EQ ability to customize songs nicely. However, if I switch to other speakers, a different EQ setting becomes necessary. Hope this sheds some light on the reason. Yes, I dd consider changing file names to accomplish this. Thanks again, Fred