Sometimes I’ll get a tune to mix and it might have a single acoustic guitar and a vocal. In order to make the guitar wider so there’s a space in the center for the lead vocal, here’s what I do: I duplicate the guitar track on two tracks and pan them hard left and right. I’ll pick a track, and it doesn’t matter which one it is, and I will nudge it by 1 ms toward the rear, so it is 1 ms behind the first track. I will keep nudging the track 1 ms by 1 ms until I get the desired effect that I want. And sometimes after that I will pan the hard left and right a little bit towards the center so it sounds a bit more natural. On top of that I will build some kind of a digital reverb room and put the acoustic guitar in that room along with the vocal. I do a whole bunch of stuff to the vocals after that, but I just wanted to mention a guitar widening effect that I sometimes use. There’s no reason you can do the same thing with a vocal track, just bear in mind that if it’s too far on the outside, it leaves a hole in the center. However, if you had two or three harmony background vocal tracks and you did that technique for each one, that would be an effective way to make the background vocals wider so you can place the lead vocal in the center. However, if you had two or three harmony background vocal tracks and you did that technique for each one, that would be an effective way to make the background vocals wider so you can place the lead vocal in the center.