06974: cninja: Sound speeds up when fighting with the stage 4.2 boss

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
06974	Sound	Minor	Always	May 17, 2018, 23:03	Mar 3, 2021, 04:00

Tester	StHiryu	View Status	Public	Platform	MAME (Unofficial Binary)
Assigned To		Resolution	Bugs That Aren't Bugs	OS	Windows Vista/7/8 (64-bit)
Status [?]	Resolved			Driver	dataeast/cninja.cpp
Version	0.197	Fixed in Version		Build	64-bit
		Fixed in Git Commit		Github Pull Request #

Summary	06974: cninja: Sound speeds up when fighting with the stage 4.2 boss
Description	When you fight with the stage 4.2 boss (the lava stage), the boss theme speeds up when that boss makes the same move (transforms into a spike ball, but not the first time you meet him). Not sure it's a bug, but due to the sounds problems in data east games (robocop, sly spy)...
Steps To Reproduce	Fight versus that final boss and wait him to transform into a ball.
Additional Information	Save state provided. All the videos from a original pcb I've found don't reach to that point. Tested in Final Burn alpha too, with the same result.
Github Commit

Flags
Regression Version
Affected Sets / Systems	cninja

Attached Files	z.zip (11,515 bytes) May 17, 2018, 23:03 Uploaded by StHiryu

related to	02108	Resolved	AJR	vaportra, vaportrau, kuhga: Data East Vapor Trail Sound Driver messed up during game play, tempo all wrong when firing.
related to	06740	Resolved	aaron	slyspy, bouldash: Sound randomly speeds up and eventually dies
related to	00389	Confirmed		cbuster, cbusterj: The tempo of the music played by one of the OKI6295's (#1 I think) speeds up when the flamethrower is used
related to	00130	Resolved	AJR	darkseal: When using your weapon the music playback would ever so slightly increase.

No.15037 StHiryu Tester May 19, 2018, 22:41 edited on: May 19, 2018, 22:44	Found a guy with an original japanese PCB and asked him to record the fight for that boss. Incredibly, the original board has the same behaviour, so for me it's clearly a BTANB. Here's the link:
No.15481 MetalGod Senior Tester Sep 18, 2018, 23:14	I've just tested the game. The speed-up ocurrs in the animation of the the dinosaur turning into a ball, not while he's rolling. The PCB shown above by StHiryu shows the same behaviour as in MAME. To show a few examples, it ocurrs in 3:02, 3:09, 3:35, 3:41, 3:48, 4:05 of the video. It's a BTANB in my opinion.
No.18505 StHiryu Tester Mar 2, 2021, 00:33	FYI: Testing new sound changes I checked this one again knowing it's a BTANB. When you hold down the attack button to make the strong attack, I have noticed that the music speeds upuntil our character is exhausted. It's the same effect that occurred in the false bug of the game, so it is very likely that both movements share the same routine that allows the music to speed up. Curious
No.18508 danylopez123 Tester Mar 3, 2021, 04:00	This same thing happens in Robocop 2 but i think i remember watching a video being played from an original PCB and it still does the same music speed up if too many sounds are played at once, ecept that in the original PCB it doesn't go very fast compared to the emulator.