00754: mikie: Background music problem in the locker room level.

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
00754	Sound	Minor	Have not tried	Feb 4, 2008, 12:08	May 30, 2010, 16:37

Tester	Machone	View Status	Public	Platform
Assigned To		Resolution	Fixed	OS
Status [?]	Resolved			Driver	konami/mikie.cpp
Version	0.118u5	Fixed in Version		Build
		Fixed in Git Commit		Github Pull Request #

Summary	00754: mikie: Background music problem in the locker room level.
Description	There's a problem with the background music in Mikie when on the locker room level. The music sounds discordant and off-key. I checked previous MAME versions and found the music broke between 0.114 and 0.114u4, almost certainly this from 0.114u3 whatsnew.txt: Lord Nightmare improved the noise emulation in the SN76496 emulator. Added several variants which differ based on the noise generator and other parameters. The music always seemed a tiny bit off even in early MAME versions (perhaps the original was the same way) but it's noticeably worse now.
Steps To Reproduce
Additional Information	First fix 0.129u4 (nicolasa), regression 0.134u3 to match actual board but is still wrong?
Github Commit

Flags
Regression Version	0.114u4
Affected Sets / Systems	mikie

Attached Files	record_in_mame_0.107.mp3 (140,544 bytes) Feb 14, 2008, 15:16
	record_in_mame_0.118.mp3 (134,400 bytes) Feb 14, 2008, 15:17
	mikie_lockerroom_pcb.ogg (728,426 bytes) Jan 31, 2009, 19:12

No.03333 hap Developer Dec 19, 2008, 19:32	sounds like 107 if you change SN76496 to SN76489
No.03355 hap Developer Dec 22, 2008, 13:35 edited on: Dec 22, 2008, 17:00	Could someone with a PCB check the soundchips labels? :) edit and, if possible, make a sound recording of the locker room level music, especially if it sounds different from either attached MP3.
No.03360 Phil Bennett Developer Dec 22, 2008, 21:04	The sound chip markings are scratched off on the actual PCB unfortunately. However, the schematics show 2xSN76489AN.
No.03708 Stefan Lindberg Senior Tester Jan 31, 2009, 19:14	I have uploaded a recording from the PCB (original of course). It's the japanese version to be more exact. It sounds slightly better than the MAME recordings in this report.
No.03745 nicolasa Developer Feb 15, 2009, 10:17	I'm wondering if Konami did this on purpose, i.e. write the wrong chip model in the schematics and put the other one in the original boards with the markings filed off, so they could prove if a pcb was not original...
No.03761 Sune_S Senior Tester Feb 20, 2009, 04:36	whistles x-files theme
No.03770 Stefan Lindberg Senior Tester Feb 21, 2009, 18:24 edited on: Feb 21, 2009, 18:24	And if it was done on purpose with Mikie maybe they added some slight wrong info in the schematics for other games as well :-)
No.05059 Machone Tester Oct 25, 2009, 07:06	This bug is back in 0134u4 due to the following change in whatsnew.txt: Verified on PCB all the clocks for Mikie, changed the M6809 clock to 1.536MHz and Vsync to 60.59Hz. Changed the sound chips to variant SN76489A which are the ones on the PCB. [Corrado Tomaselli] Seems as though there may be a problem with MAME's emulation of the sound chip somewhere down the line.
No.05064 Tafoid Administrator Oct 26, 2009, 17:24	Reopened
No.06208 hap Developer May 30, 2010, 16:11	It sounds the same as mikie_lockerroom_pcb.ogg to me now, can someone confirm?
No.06209 Fujix Administrator May 30, 2010, 16:37	Confirmed the fix, thank you.