Not sure if anyone is working on this core anymore but would be nice to iron out that issue, for what would then be (to me at least) an arcade-perfect experience
![Smile :)](./images/smilies/icon_e_smile.gif)
The background "rack" noise the enemies make (the drone sound) is completely wrong. Not an issue of being a little off, or differences in how boards sound. I've owned maybe a dozen different Galaxian boards, MAME sounds 100% better than Galaxian on MiSTer. The schematic is pretty simple, there are 3 different oscillators that feed into low pass filters, and then the result is summed. Looking at the Galaxian HDL, it looks like a sine waveform approximation?ExCyber wrote: ↑Sun Feb 07, 2021 6:28 pm Galaxian sound accuracy is apparently still an open question at this point, partly because it's not clear that all boards actually used the same component values. There's a lot of analog stuff in the sound hardware that might have been fudged with "close enough" resistors/capacitors in some production batches, not to mention potential issues associated with temperature and component aging.
https://mametesters.org/view.php?id=443
And UniWarS, it also uses the same circuitry for the background sound.