The minimum I need to know to build a DSP system:

1. General DSP notation – Essential for understanding formulas and interpreting technical literature.
2. x[n], y[n], domains – Fundamental concepts for system modeling (e.g., time, frequency, or spatial domains).
3. Convolution – A key operation in linear time-invariant (LTI) systems for calculating system output.
4. Impulse response – Critical for describing how a system reacts to a unit impulse input.
5. Decomposition / Superposition – Important when analyzing linear systems or separating/combining signal components.
6. Standard deviation – Useful for measuring signal variability and setting dynamic thresholds.
7. Statistics / Probability – Necessary for handling noise, performing filtering, and making decisions under uncertainty.
8. Basic mathematics – Required as a foundation for all DSP concepts.
9. PRT code – Essential for implementing the system logic within ProRealTime.