MixFix

Simple and to the point. Does what it says, and does it well and without any bloat. As someone who often can have multiple media sources playing, being able to pan one source to each ear/side helps a ton when trying to focus on one or another compared them being overlaid. Works great for panning media off to one side if you need a side dedicated to communication apps like discord and such to hear voices clearly, while still enjoying your media. I'm sure there are a ton of other great uses... So if you have a use for the individual control of pan and volume per tab; Get this. There may be others out there, but you can't beat the simplicity/ease of use/no hassle approach that this offers.