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seibu/wiz.cpp
ID Category [?] Severity [?] Reproducibility Date Submitted Last Update
07980 Sound Minor Always May 20, 2021, 11:44 1 day ago
Tester jkburks View Status Public Platform MAME (Official Binary)
Assigned To Resolution Open OS Windows 10 (64-bit)
Status [?] Confirmed Driver
seibu/wiz.cpp
Version 0.231 Fixed in Version Build 64-bit
Fixed in Git Commit Github Pull Request #
Summary 07980: scion: constant background white noise
Description Scion (Seibu) has loud white noise in the background from the moment you start the emulation
The game is flagged for imperfect sound,
The Cinematronics clone of Scion does not exhibit this defect.
The regression version for Scion was 0.144 13 Nov 2011.
In 0.143 both sets sound the same.
In 0.144 the parent set only adds this white noise.
Steps To Reproduce
Additional Information
Github Commit
Flags
Regression Version 0.143u6
Affected Sets / Systems scion
Attached Files
  
Relationships
There are no relationship linked to this issue.
Notes
6
User avatar
No.18865
jkburks
Tester
May 20, 2021, 11:53
edited on: May 20, 2021, 11:55
 I just checked the driver comments:

Background noise in scion (but not scionc). Note that the sound program is
  almost identical, except for three patches affecting noise period, noise
  channel C enable and channel C volume. So it looks just like a bug in the
  original (weird), or some strange form of protection.

If the noise is there in 0.143, then I can't hear it at all. If so it certainly gets louder in 0.144.
Maybe this report should be closed?
User avatar
No.18866
Haze
Senior Tester
May 20, 2021, 14:05
 I wonder if the patches are intentional, or a bad dump.

Also is channel C used for anything else? maybe it's not routed if the game doesn't need it.
User avatar
No.23954
JimCarlTay
Tester
1 day ago
 The Arcade Archives version does not have the constant white noise (thus appearing fixed compared to MAME), but there is also a case where you can hear a voice say "Wow" after completing an area, which doesn't seem to be emulated in MAME.
User avatar
No.23955
hap
Developer
1 day ago
 When does it say "wow"? (better to make a new MT report for that, this one is not related)
User avatar
No.23956
JimCarlTay
Tester
1 day ago
 In the video: Stage 1, after completing area 3 (the one with the bird's eye view of the city and fields). Exact timestamp: 1:47.
User avatar
No.23957
JimCarlTay
Tester
1 day ago
 P.S. I don't know if there are any in-game prerequisites to be able to hear that voice line.