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ID Category [?] Severity [?] Reproducibility Date Submitted Last Update
08179 Sound Minor Always 2 days ago 1 day ago
Tester vidpro1 View Status Public Platform MAME (Official Binary)
Assigned To Resolution Open OS Windows 10/11 (64-bit)
Status [?] New Driver fantland.cpp
Version 0.239 Fixed in Version Build 64-bit
Fixed in Git Commit Github Pull Request #
Summary 08179: galaxygn: Galaxy Gunners and Fantasy Land - Yamaha YM2151 Sound Frequency pitch incorrect? Have youtube video of PCB
Description I found a video of a Galaxy Gunners and Fantasy Land PCB on youtube. Sounds like the frequency setting on the Yamaha chip is too low anyone else have a PCB? Unfortunately the audio volume is too low on youtube. It sounds like it is off by 30% -33% pitch match test with -debug overclock ymsnd 133%
Maybe the YM2151 OPM needs to be at 4MHZ? Probably all the games on that hardware driver have the wrong frequency.







ym2151_device &ymsnd(YM2151(config, "ymsnd", 3000000));
ymsnd.irq_handler().set(FUNC(fantland_state::galaxygn_sound_irq));
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Affected Sets / Systems galaxygn
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No.19690
Osso
Developer
1 day ago
In the following link there's a Galaxy Gunners PCB where the visible XTAL in the audio section is 8 MHz. So maybe 8 MHz / 2 for the YM2151?

https://arcadeclassics.com.au/arcade_games/video-game-pcbs/galaxy-gunners/