The FM synthesis version of Undine's soundtrack and honestly it's a completely different vibe from the PSG one. Running through the YM2203 OPN chip on PC-88, everything gets this richer, slightly gritty FM warmth. The opening theme has actual body to it now, the melody carried by that distinctive metallic FM tone that just screams late-80s Japanese PC gaming.
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The battle theme hits way harder here, with FM bass giving it real weight underneath those fast lead lines. The cave dungeon track nails that claustrophobic feel with darker timbres the PSG version couldn't touch. Even the fanfare after battles sounds fuller.
If you listened to the PSG version already, hearing these same compositions through FM synthesis is like seeing them in color for the first time.