What does host based processing refer to in Pro Tools?

Host based processing in Pro Tools refers to the utilization of the computer’s processing capacity to handle audio processing tasks. This method relies primarily on the internal resources of the computer, specifically the CPU and RAM, to run audio effects and virtual instruments. By processing audio data on the computer, Pro Tools can take advantage of powerful modern CPUs which are capable of handling multiple audio channels and complex signal processing without the need for external hardware.

This approach allows for greater flexibility in mixing and editing since it can harness the full potential of the computer's specifications, enabling users to run numerous plugins and effects simultaneously. It also simplifies workflows as it eliminates additional latencies that can occur when routing through external hardware devices.

Utilizing host based processing also means that users can take full advantage of software updates and add-ons without having to invest in new physical hardware, making the system more adaptable to evolving production needs.