A tutorial covering the fundamentals of delay lines and FIR comb filters in digital signal processing, with practical C code implementation on an STM32H7-based DSP platform. Explains circular buffer-based delay line implementation, the FIR comb filter difference equation with alpha/beta gain parameters, frequency domain analysis (Bode plots, pole-zero maps), and how delay time controls peak/trough spacing in the comb filter response. Includes real hardware measurements using an oscilloscope/function generator and audio demonstrations with a guitar effect pedal.
•29m watch time