That works only for games with I2S compatible soundchips but I can suggest a lot which you could use your circuit with:
YMF-278B (OPL4) Newer Raizing/Psyko and other games with SH-2 CPU
YMF271 (as you were able to)
Any variations of other Yamaha sound chips using YAC513 or YAC516 DAC.
Some Konami games which use I2S output from custom sampler chips
Some modern 3D games from Konami using Ricoh samplers.
SEGA Titanvideo, NAOMI, Namco System 246/256... Etc.
Great stuff. Excellent way to get rid of processing noise too...