Overall Verdict: ⭐⭐⭐⭐½ (4.5/5) An essential nostalgia machine for 90s Sega fans, but requires a bit of patience with sample mapping. 1. What Is It? The "Sonic CD Soundfont" is not a single, official file. It is a community-created .sf2 file (SoundFont 2 format) that replicates the instrument bank of Sonic the Hedgehog CD . It targets the PC version's MIDI soundtrack (composed by Spencer Nilsen, David Young, etc.), which had a distinctly different, more "studio synth" feel compared to the Japanese/USA console FM synth or CD-DA tracks.