Improving Sega CD PCM Audio Quality with Low-Pass Filtering
2025-02-17
This article delves into the reasons behind the poor audio quality of the Sega CD's PCM sound chip and proposes a solution: using low-pass filters to enhance audio quality. It explores differences in audio hardware across various Genesis models and the role of low-pass filters in audio processing. Through experiments, the author compares the effectiveness of different types of low-pass filters (Butterworth IIR filters) and provides code examples. Ultimately, the author successfully improves the sound quality of Sega CD PCM audio and summarizes important considerations when implementing IIR filters in software.