06932: many irem m72 sets: [possible] vgm & sfx problem

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
06932	Sound	Minor	Always	Apr 5, 2018, 05:00	May 23, 2021, 14:56

Tester	ArcadeGuy	View Status	Public	Platform	Other
Assigned To		Resolution	Open	OS	Windows Vista/7/8 (32-bit)
Status [?]	Acknowledged			Driver	irem/m72.cpp
Version	0.196	Fixed in Version		Build	32-bit
		Fixed in Git Commit		Github Pull Request #

Summary	06932: many irem m72 sets: [possible] vgm & sfx problem
Description	vgm to loud and sfx to low sound effects like screams,explosions,shots are to low compared to vgm on many m72 irem games lightning swords is one
Steps To Reproduce	play the game
Additional Information
Github Commit

Flags	Possible
Regression Version	between 176,77,78
Affected Sets / Systems	many irem m72 sets

Attached Files

No.14920 Tafoid Administrator Apr 5, 2018, 08:47	Per: http://mametesters.org/rules.html Sound Balance/Proportion Except for heavy regression, a report for sound balance/proportion between multiple sound devices always needs the original references to determine the correct value of each volume. Direct sound recording of the PCB is the most appropriate. We will accept arcade soundtrack but please keep it in mind that they usually have delay affected/echoed/remixed and don't always represent the real sound balance correctly. We need specific a machine example here with reference recordings for that machine for this to even be accepted. Otherwise, you can simple adjust the Sliders to set the volume of your choice to each sound element.
No.14922 haynor666 Tester Apr 5, 2018, 18:19
No.14925 B2K24 Senior Tester Apr 6, 2018, 14:19	Thanks for the examples, haynor666. I'll acknowledge this for now pending research/investigation.
No.16000 MetalGod Senior Tester Jan 5, 2019, 02:44	This is related to 07075 (hammerin' harry victory scream) https://www.youtube.com/watch?v=lYm1k-Jaca
No.16308 StHiryu Tester Apr 10, 2019, 01:14	As reporter in 07075, recently the DAC volume for M72 driver has been increased against version 0.207 in +3,5dB, but it's still under the values of Mame 0.172 (reggression version) in -2,6dB. Cannot be set as resolved until checking the true DAC PCB volume.
No.16603 Mamesick Senior Tester Jul 2, 2019, 05:42 edited on: Jul 2, 2019, 05:43	in mame/drivers/m72.cpp at line 1866: DAC_8BIT_R2R(config, "dac", 0).add_route(ALL_OUTPUTS, "speaker", 0.3); // unknown DAC change to DAC_8BIT_R2R(config, "dac", 0).add_route(ALL_OUTPUTS, "speaker", 0.4); // unknown DAC will make the volume really close to PCB videos posted here and to the value of MAME 0.172. Obviously this still need confirmation agaisnt a PCB.
No.18896 StHiryu Tester May 23, 2021, 14:56 edited on: May 23, 2021, 15:06	Affected with commit b8849e0341db7815ec83f1f3c4879abbf35586b5, which solves 07075 but I am not clear that this one is resolved. Tested R-Type first level and all music and sfx sound lower, maybe someone with a greater knowledge of this game or other m72 sets can verify it more exactly. Edit: Tested lightning swords and the fix is very noticeable with the character scream when dying.