02778: suzuka8h, suzuk8h2, finallap, finalap2, finalap3, fourtrax + clones: buzz/humming sound in background

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
02778	Sound	Minor	Always	Dec 27, 2008, 19:34	May 21, 2021, 19:24

Tester	Endaar	View Status	Public	Platform	MAME (Official Binary)
Assigned To	Kale	Resolution	Fixed	OS
Status [?]	Resolved			Driver	namco/namcos2.cpp
Version	0.128u6	Fixed in Version	0.232	Build
		Fixed in Git Commit	041c296	Github Pull Request #

Summary	02778: suzuka8h, suzuk8h2, finallap, finalap2, finalap3, fourtrax + clones: buzz/humming sound in background
Description	Shortly after starting the game - basically, as you get on the motorcycle - the music stops playing and turns into a loud hum. Sound effects continue to work normally and the game is playable. update not music related, see comment
Steps To Reproduce	Insert coin, start game.
Additional Information	I tried a number of other games with the same driver. This issue appears to exist in Final Lap and Four Trax, although in both it is less noticeable. Four Trax's music actually worked briefly after the race started but then turned into a hum as well. I did not try every single game sharing the driver, but a number of others work normally. suzuk8hj -> suzuka8hj in 0.133u1
Github Commit

Flags
Regression Version
Affected Sets / Systems	suzuka8h, suzuk8h2, finallap, finalap2, finalap3, fourtrax + clones

Attached Files	suzuka.wav (226,348 bytes) Dec 27, 2008, 20:50

No.03417 Haze Senior Tester Dec 27, 2008, 20:34	the buzzing is the engine sound... probably wrong tho, definitely sounds strange. the ym2151 is silent at this point, so if it's meant to be playing some music, that is also a bug.
No.03418 Endaar Tester Dec 27, 2008, 20:52	I just uploaded a quick audio clip of what happens for me. This is right as the game itself starts and the rider is on track ready to run to the bike. There appears to be music which then turns into the hum. Maybe what I'm thinking is music though is just a sound effect. Anyway, hope it helps.
No.16553 Osso Moderator Jun 17, 2019, 08:15	Video reference:
No.16590 Osso Moderator Jun 25, 2019, 05:58	According to Guru, testing on his real Final Lap 3 PCB: "on real hardware if the voice2 ROM is removed there's still in-game sound whereas in MAME there are no in-game sounds and if both voice ROMs are removed from the PCB the in-game sound is almost exactly like in MAME, which suggests the voice ROMs are incorrectly mapped or a mirror mapping is missing." I guess it could also be different c140 banking. Currently the device has 3 different banking types but maybe there's at least a fourth one?
No.18867 hap Developer May 20, 2021, 15:31	It's not a music problem (from videos on youtube, pcb does not play music during driving)
No.18868 MetalGod Senior Tester May 20, 2021, 15:48	It seems Kale is close to solve this :)