Viewing Issue Advanced Details
ID Category [?] Severity [?] Reproducibility Date Submitted Last Update
07181 Sound Minor Always Dec 22, 2018, 15:34 Feb 23, 2019, 17:40
Tester Kale View Status Public Platform MAME (Official Binary)
Assigned To Kale Resolution Open OS Windows 10 (64-bit)
Status [?] Acknowledged Driver dec0.cpp
Version 0.204 Fixed in Version Build 64-bit
Summary 07181: midresb, midresbj: [possible] Erratic sound
Description As much as I love the idea of having a Midnight Resistance with Hippodrome/Fighting Fantasy music sampler, it sounds totally odd and off key to me, needs checking out on real HW.
Steps To Reproduce Play the game or watch this YT video:
Additional Information
Flags Possible
Regression Version
Affected Sets / Systems midresb, midresbj
Attached Files
 
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Notes
5
User avatar
No.15942
Fujix
Administrator
Dec 22, 2018, 18:51
Arcade PCB captures:
https://www.nicovideo.jp/watch/sm5330603
https://www.nicovideo.jp/watch/sm5331033
User avatar
No.15944
haynor666
Tester
Dec 23, 2018, 11:19
Do we know that bootleg sounds should be the same as in original versions?
User avatar
No.15946
AJR
Developer
Dec 24, 2018, 04:00
haynor666 brings up a relevant point: you can't assume that a bootleg running on different hardware plays music at the most appropriate-sounding pitch. To use another bootleg from dec0.cpp as an example, Automat's sound program is largely copied from Section Z, yet a PCB recording of Automat had the OPN music playing at a different pitch than in the Capcom game.

This question could probably be settled best by measuring clocks for the sound chips on this bootleg, or one of the Robocop/Dragon Ninja bootlegs that run on similar oversized two-board stacks (though some elements of this hardware are known to be variably populated).
User avatar
No.15950
Kale
Developer
Dec 24, 2018, 22:14
edited on: Dec 24, 2018, 22:16
What I wonder if there isn't something that actually modifies the commands in the 68k-to-z80 comms to be more heardable, like an XOR.
Setup can be easily guessed with a bootleg PCB recording in case this is true.
Unless these weren't supposed to be played with sound at all lol
User avatar
No.16165
Kale
Developer
Feb 23, 2019, 17:40
Acknowledged until a bootleg board of this is tested.