Abstract: Embodiments of the present invention are directed to a hybrid system for analog audio processing with digital control. The hybrid system utilizes an analog processing box (APB) that is coupled with a computer to digitally control parameter calculations and other parts of the system, and for parameter automation and parameter preset recall. The APB includes algorithms that are implemented in the analog domain using a combination of raw algorithm functions and is configurable such that selected analog algorithm(s) can be realized using the same analog implementation. The APB lacks external, physical moving controls and internal circuitry to calculate control signals. Instead, control signals are transmitted with audio signals in complete synchronization from the computer to the APB via a single path for the control of the APB. The selected analog algorithm is configurable based on modification of side-chain, signal processing that is performed outside of the APB.