Viewing Issue Advanced Details
ID Category [?] Severity [?] Reproducibility Date Submitted Last Update
07980 Sound Minor Always May 20, 2021, 11:44 May 20, 2021, 23:02
Tester jkburks View Status Public Platform MAME (Official Binary)
Assigned To Resolution Open OS Windows 10 (64-bit)
Status [?] Confirmed Driver 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
Regression Version 0.143u6
Affected Sets / Systems scion
Attached Files
There are no relationship linked to this issue.
User avatar
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
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.