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ID Category [?] Severity [?] Reproducibility Date Submitted Last Update
03363 Sound Minor Always Jul 27, 2009, 07:43 Jul 6, 2019, 18:44
Tester Gyrovision View Status Public Platform MAME (Official Binary)
Assigned To Resolution Open OS
Status [?] Confirmed Driver snk6502.cpp
Version 0.133 Fixed in Version Build
Summary 03363: vanguard, vanguardc, vanguardj: Broken enemy firing sound
Description The enemy ship's firing sound in MAME is an incorrect high pitched hiss.
The hiss has to do with the #2 mono SN76477 (SN76477.2)
The hiss first appears in 0.112 but is absent in 0.111.
There were 6 "U" releases between 0.111 and 0.112. In 0.111u6 the SN76477 was rewritten, it's possible it may have been broken in 0.111u6 but I cannot test it to confirm.
Steps To Reproduce Temporarily remove or disable vanguard external samples to hear the problem more clearly.
Play the game and after about a minute the enemy ships will start shooting at you and you can easily compare the bad sound in MAME to the YouTube video.
Additional Information
Flags Verified with Original
Regression Version
Affected Sets / Systems vanguard, vanguardc, vanguardj
Attached Files
zip file icon 03363 - vanguard vanguardc - ENEMY firing (699,810 bytes) Jun 16, 2011, 05:17 Uploaded by Gyrovision
ENEMY sound video clip
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User avatar
Senior Tester
Jul 6, 2019, 18:39
edited on: Jul 6, 2019, 18:45
The issue still exists.
The provided video doesn't work anymore, so I've found another one. We can check the original sound here

Edit: I've also added the japanese version of the game, vanguardj. All clones affected then.