08038: finallap, finalap2, finalap3: screeching & spark sound effects do not play

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
08038	Sound	Minor	Always	Jul 23, 2021, 19:18	1 day ago

Tester	Cow	View Status	Public	Platform	MAME (Official Binary)
Assigned To		Resolution	Open	OS	Windows 10 (64-bit)
Status [?]	Acknowledged			Driver	namco/namcos2.cpp
Version	0.235	Fixed in Version		Build	64-bit
		Fixed in Git Commit		Github Pull Request #

Summary	08038: finallap, finalap2, finalap3: screeching & spark sound effects do not play
Description	EDIT: added Final Lap 2 & 3 because I found reference vids
Steps To Reproduce	Play the game for a little bit
Additional Information
Github Commit

Flags	Verified with Original
Regression Version
Affected Sets / Systems	finallap, finalap2, finalap3

Attached Files	Mame 2021.07.23 - 14.14.57.02 Trim-1.mp4 (3,500,741 bytes) Jul 23, 2021, 19:18 Uploaded by Cow

No.19238 Tafoid Administrator Sep 10, 2021, 02:46	You don't need to change the tested version as new versions show up. Everything in the system that isn't resolved is resumed still a valid bug report. Now, if you posted that the bug has been corrected, we could handle accordingly otherwise we fail to get a true representation of when a bug was noticed which is important when trying to trace possible regressions.
No.24385 hap Developer 1 day ago edited on: 1 day ago	Just some notes: It's on C140 channel 0xb, apparently both the screech and the spark sound. The tyre screech sound is initialized at start address 0, with a length of 0x10. ROM 0x0-0xf is a saw wave. It plays it at very low frequency, hence you only hear a barely audible crackle. It's more audible if you change the frequency to let's say 0x3000, but still does not sound like the real thing. The spark sound sets a few unknown mode flags (reg 0x5), maybe that's why it's not audible. Since it happens on all Final Lap games, it can't be protection related (finallap(1) does not have that custom protection). I don't think it's a voice ROM load order issue either. Arcade Archives has emulated it correctly.

No.19238

Tafoid

Administrator

Sep 10, 2021, 02:46

You don't need to change the tested version as new versions show up. Everything in the system that isn't resolved is resumed still a valid bug report. Now, if you posted that the bug has been corrected, we could handle accordingly otherwise we fail to get a true representation of when a bug was noticed which is important when trying to trace possible regressions.

No.24385

hap

Developer

1 day ago

edited on: 1 day ago

Just some notes:
It's on C140 channel 0xb, apparently both the screech and the spark sound.
The tyre screech sound is initialized at start address 0, with a length of 0x10. ROM 0x0-0xf is a saw wave. It plays it at very low frequency, hence you only hear a barely audible crackle. It's more audible if you change the frequency to let's say 0x3000, but still does not sound like the real thing.

The spark sound sets a few unknown mode flags (reg 0x5), maybe that's why it's not audible.

Since it happens on all Final Lap games, it can't be protection related (finallap(1) does not have that custom protection).
I don't think it's a voice ROM load order issue either.

Arcade Archives has emulated it correctly.