mixer

noun

1. a person or thing that mixes; specif.,
   1. ☆ a person with reference to the ability to get along with others: a good mixer
   2. an electric appliance for mixing or beating foods
   3. a machine for mixing: concrete mixer
   4. a person responsible for combining and balancing visual or sound sources, as for film soundtracks, radio or TV broadcasts, etc.
2. a social gathering, as a dance, for getting people acquainted with one another
3. a beverage, as soda water or ginger ale, for mixing with alcoholic liquor
4. Electronics
   1. a device or circuit for combining carriers of differing frequencies to produce a desired carrier
   2. an electrical apparatus in which signals from various audio sources are combined in desired proportions