Can anyone paraphrase it? I sort of know what it means, but not exactly...
Thanks very much.
It depends upon the context. It could literally mean "in the mixture" as in an ingredient in a recipe. It could refer to music; when the producer is adjusting his dials and levers in the studio, making some instruments louder and some softer, we refer to this as "the mix." A musician might say "I'd like to have more drums in the mix." It can also be used to describe adding an item or concept to an existing group or melange. "My grandfather has an extensive collection of fine French wines, along with a few Portuguese and Californian selections in the mix."