The phrase "to make the mix" means to create or compile a combination of different things or elements together. It is often used when referring to putting together different ingredients or components to form a mixture or blend. Full definition
Just make a mix of carrier oils and that's it. (manlinesskit.com)
At the show this year, we are able to show off the great new designs from these partners making mixed reality available for everyone later this year. (blogs.windows.com)
It will instantly give you flashbacks of when you use to make mix tapes of your favorite hits to play in the car. (bluesurfsanctuary.com)