Implementation of FIR Digital Filters on FPGA Board for Real-Time Audio Processing

This research paper presents the implementation of digital filters on an FPGA platform for real-time audio signal processing. The paper utilizes the Basys-3 field programmable gate array (FPGA) board and the peripheral module (PMOD) 12S2 accessory to process audio data using digital finite impulse response (FIR) filters. The extension of the filter kernel length is achieved by converting the dual-channel input to a single-channel output, and the use of free LUTs (Look Up Tables) as digital signal processing (DSP) multipliers, optimizing the utilization of available resources. The successful implementation of the filters highlighted the potential for FPGA-based solutions in audio engineering and digital signal processing. The results provide valuable insights that can guide future work in optimizing FPGA-based digital filters for audio engineering.