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The OPL2 and 3 chips were all-digital, so it's possible to verify that the bitstreams from the original chips matches the outputs of an emulator of the chip...b
by khedoros 11y ago
The OPL2 and 3 chips were all-digital, so it's possible to verify that the bitstreams from the original chips matches the outputs of an emulator of the chip...but the original hardware also included some specific ADCs with some kind of buffer feedback loop, and I think that's where the real difference in the sound comes in (like the overly-harsh drum sounds from most of the emulators).
I'm working on a side-project right now to build a USB-connected YMF262+YAC512 board for the reasons you've mentioned. I've actually got a 600MHz K6-3 with 128MB of RAM, Geforce4 ti4400 and SB16 that I use as a retro computer, but if I can have the same, proper audio output on my regular machines, that would be even better.
- Grishnakh 11y agoRelying on ancient hardware is not a good idea for the long term: it'll eventually fail. It should be possible to revive some of this old hardware and characterize the sound, using specific inputs and recording the outputs, and creating a filter which can then be included in emulators to recreate the original sound.
- strangecasts 10y agoI'm working on a side-project right now to build a USB-connected YMF262+YAC512 board for the reasons you've mentioned. Do you have a progress log/project page up anywhere? I've been meaning to build a similar board for an earlier FM chip.