That's interesting, I didn't know it was used in those games.
Beatmania sounded to me like a modern enough series to use "pre-rendered" audio tracks.

November 11, 2025 - 19:28 UTC

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The arcade machines have a hard drive in them, and use two of these chips. Songs get banks of 16 megabytes for each song, and pressing the keys plays short samples from it.

I am a rhythm game enthusiast, so getting the audio just right is crucial :) MAME had wrong DPCM tables for years.
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The big thing I am trying to figure out right now is, what kind of interpolation is being used for lower sample rates. I can tell with lower frequency content that something is being used. But if it's something with a lookup table (like SNES's interpolation) then I'll have to pick it apart in a ROM.
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