Game Boy Advance Audio Interpolation
5 hours ago
- #audio
- #GBA
- #emulation
- Audio enhancement in Game Boy Advance (GBA) emulators reduces aliasing and noise.
- Nearest neighbor interpolation in GBA hardware causes noticeable audio aliasing.
- Alternative approaches like MP2K HQ exist but are limited to specific games.
- Enhanced interpolation resamples audio channels directly to the output sample rate.
- PCM channel sample rates are calculated using GBA timer settings.
- Resampling algorithms include cubic Hermite and windowed sinc interpolation.
- Cubic Hermite is better for upsampling, while sinc reduces aliasing but may muffle sound.
- PSG channels require separate resampling and may need low-pass filtering.
- Dynamic low-pass filtering of PSG output can improve sound quality.
- Performance impact is significant due to high-quality resampling and filtering.