I am working on a mix and it sounds decent so far, but looking at my correlation meters, everything seem to be straight up the middle, even with my tracks panned. What are some techniques I could use to widen my mix?
Ok, imaging:
First of all: great frequencies management, I mean great and needed only EQ about great tracks peforming... because it will create spacement;
Then you analyze in mono while doing fadering, but the first aspect of a mix is managing levels like puting them down to avoid clipping about playlist editing, for example;
After you check your mix in mono, you might do a great management about paning towards cohesive/creative with reasoning options, then you would do great placements about what would make sense, for a good listener position being about great experience;
Then, you won't exaggerate about Imagers, iZotope Ozone Imager or Imager 2 is marvelous, like Wizard by AudioFusion Bureau (free too), but I would analyze graphically how it's about correlation: +1 = very mono, near 0.3 I like, but all depends... then after the placement about a nice Imager, you make use of Mid-Side EQ or Mid-Side compression, you decide, try what's better about low levels to not have surprises and only what really makes sense to be tried;
Then fx about aux channel or channels with filtering first (EQ), reverb and I like to add a compressor after, sounds way natural to me.
These are things that to me enhanced my workflow entirely about how I do my online music mixing and mastering services.
Not exaggerating, less is more (only not if really matters to you creative or technically)...
Check with tools like Expose v2 by Mastering the Mix too. I bypassed another mix/master things for sure, a lot of things should be done greatly for a major result, but well... some of the advices I did I apply.