  Let $G$ be a countable discrete sofic group. We define a concept of uniform
mixing for measure-preserving $G$-actions and show that it implies completely
positive sofic entropy. When $G$ contains an element of infinite order, we use
this to produce an uncountable family of pairwise nonisomorphic $G$-actions
with completely positive sofic entropy. None of our examples is a factor of a
Bernoulli shift.
