A board mix is a recording created by running lines directly off a

mixing console A mixing console or mixing desk is an electronic device for mixing audio signals, used in sound recording and reproduction and sound reinforcement systems. Inputs to the console include microphones, signals from electric or electronic inst ...

while the sound is mixed in real-time. The alternative to a board mix is use a virtual mixing console, an increasingly popular approach.

References

Sound recording Audio mixing {{music-stub