01017: nslasher: The music stops at some points in the game when fighting bosses and some points in level 2.

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
01017	Sound	Major	Have not tried	Feb 8, 2008, 12:13	Jan 30, 2009, 19:49

Tester	hammad	View Status	Public	Platform
Assigned To	Mamesick	Resolution	Fixed	OS
Status [?]	Resolved			Driver	dataeast/deco32.cpp
Version	0.103u2	Fixed in Version	0.129u3	Build
		Fixed in Git Commit		Github Pull Request #

Summary	01017: nslasher: The music stops at some points in the game when fighting bosses and some points in level 2.
Description	The music stops at some points in the game when fighting bosses and some points in level 2 and after that too is this normal or what .... only the punch and beating sounds come and music goes off. I have the pcb too (the japan version dump comes from mine pcb) and in mame it's like if it's played 2x. Infact even if you don't have the pcb you can hear that it sounds wrong, drumming which cuts off and and so on. The sound effects are right instead. Music recording of the PCB is attached. Follow-up from Kold666 in 0.111u6: Not fixed yet. There are some sound problems. Sometimes the music doesn't play, sometimes it plays but when you select the character there is no speech. Every time you start the game (without reset of course) there are different sound problems.
Steps To Reproduce
Additional Information
Github Commit

Flags
Regression Version
Affected Sets / Systems	nslasher

Attached Files	nslasher0103u2yel.wma (1,277,857 bytes) Feb 25, 2008, 09:48

No.02640 Mamesick Senior Tester Sep 29, 2008, 06:35	MDRV_INTERLEAVE(100) improves things. I played the game intensively and the bug seems gone away.
No.02643 Haze Senior Tester Sep 29, 2008, 13:33	I don't see why increasing the interleave would help in this case. The sound comms looks to be bi-directional, via sound-latch reads and writes, which AFAIK should sync the CPUs anyway.
No.03390 Smitdogg Senior Tester Dec 25, 2008, 00:23	I noticed also that some speech samples are played twice like "you can't beat me" and "you caught me off guard". The first time they play they are at a lower volume than the second.
No.03432 aaron Developer Dec 30, 2008, 06:10	Bidirectional sound communication actually often requires interleave. The auto-syncing with the sound latch only works if an earlier CPU signals one that hasn't yet executed. When the latter CPU attempts to signal back to the first one, it is has likely already wasted time spinning.
No.03434 Mamesick Senior Tester Dec 30, 2008, 07:47	I can still confirm that MDRV_QUANTUM_TIME (HZ(6000)) improves things. I cannot test intensively at the moment but the last time I played this game in my personal build with the interleave applied, I didn't noticed any sound bug. Don't know about Smitdogg reported issue but I think it should be related to sound comms too.
No.03700 Smitdogg Senior Tester Jan 30, 2009, 19:49	FWIW I checked this in u3 and didn't notice samples being played twice anymore.