09122: othello: BGM Plays at Double Speed and Higher Pitch

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
09122	Sound	Minor	Always	Feb 20, 2025, 14:46	Feb 20, 2025, 15:54

Tester	sasuke	View Status	Public	Platform	MAME (Official Binary)
Assigned To	sasuke	Resolution	Fixed	OS	Windows 10/11 (64-bit)
Status [?]	Resolved			Driver	success/othello.cpp
Version	0.274	Fixed in Version	0.275	Build	64-bit
		Fixed in Git Commit	152e3d7	Github Pull Request #

Summary	09122: othello: BGM Plays at Double Speed and Higher Pitch
Description	The background music plays at double speed. The correct state can be observed when the sound CPU overclocking is set to 50%. Additionally, the pitch of the PSG sound is too high. Setting both AY-3-8910 clock to about 90% matches the pitch of the original PCB.
Steps To Reproduce
Additional Information	MAME: Video of the original arcade PCB: Arcade Archives version (for reference):
Github Commit

Flags	Verified with Original
Regression Version
Affected Sets / Systems	othello

Attached Files