08998: All taitosj sets: [possible] Missing filter on DAC

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
08998	Sound	Trivial	Always	Dec 6, 2024, 17:44	Dec 8, 2024, 16:26

Tester	125scratch	View Status	Public	Platform	MAME (Official Binary)
Assigned To		Resolution	Open	OS	Windows 10/11 (64-bit)
Status [?]	Direction Needed			Driver	taito/taitosj.cpp
Version	0.272	Fixed in Version		Build	64-bit
		Fixed in Git Commit		Github Pull Request #

Summary	08998: All taitosj sets: [possible] Missing filter on DAC
Description	From the PCB footage of Taito SJ games I found, it seems like they use a stronger low-pass filter for sounds played with the 8-bit R-2R DAC, most noticable when inserting a coin in any game, on the avalanche stage in Jungle King, and the car scene at the end of a stage in Elevator Action. Sources: Edit: More PCB footage of SJ games: You can really hear a difference in Wild Western's train whistle. Also: the Arcade Archive releases of SJ games include the filter.
Steps To Reproduce	Coin up a game with sound on, reach any part of a Taito SJ game with DAC sounds
Additional Information
Github Commit

Flags	Possible
Regression Version
Affected Sets / Systems	All taitosj sets

Attached Files

No.22559 Fujix Administrator Dec 8, 2024, 13:45	There is a "Possible" flag.
No.22562 125scratch Tester Dec 8, 2024, 16:26	Thank you for letting me know.