PreSonus StudioLive 32R- 32 CHANNEL DIGITAL MIXER is a digital mixer that defines versatility. The best digital mixer for your rack. a digital stage box 64-channel audio interface. It is a complete networked solution. The StudioLive 32R digital mixer is four audio tools in two compact rack spaces. Use it as a standalone digital mixer with UC Surface remote mixing software. Pair it with your StudioLive Series III console mixer to use as a stage box or integrated monitor mixer