02080: armedf: DAC Chip playing Orchestra Hit Sample too low

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
02080	Sound	Minor	Always	Aug 3, 2008, 14:44	Jan 17, 2011, 17:39

Tester	vidpro1	View Status	Public	Platform	MAME (Official Binary)
Assigned To	hap	Resolution	Fixed	OS	Windows XP/Vista 64-bit
Status [?]	Resolved			Driver	nichibutsu/armedf.cpp
Version	0.126u3	Fixed in Version	0.141u1	Build	I686
		Fixed in Git Commit		Github Pull Request #

Summary	02080: armedf: DAC Chip playing Orchestra Hit Sample too low
Description	I own one of these PCBS and the orchastra hit sample in the 1st and last BGM levels is playing back at the wrong frequency in emulation. My only guess to fix it is to have the source code handle the sample at a particular rom address to play it back properly. ROM af_10.rom has the YM3812/Z80 sound data with the DAC samples in it. I will attach a sound sample of what it is supposed to sound like @ 8KHz 8 bit.
Steps To Reproduce
Additional Information
Github Commit

Flags	Verified with Original
Regression Version
Affected Sets / Systems	armedf

Attached Files	armedfohit.wav (4,372 bytes) Aug 3, 2008, 14:44

No.01915 Tafoid Administrator Aug 3, 2008, 17:51 edited on: Aug 3, 2008, 17:52	I've tried MAME to hear the sample in the first level to compare to the recording.. I couldn't recognize the orchestra hit in the music. In the service mode, your two tracks (level 1,6) are #48 and #53. Perhaps the default volume might be too low? Can anyone else hear the difference (or even find the DAC sample) in this game? Vidpro1 - if you could also record the MAME output of the orchestra hit, that would be useful.
No.01916 Machone Tester Aug 3, 2008, 18:05	Yeah, I hear it. I turned the volume down for the YM3812 first though (which I suspect is too loud at present for this game, perhaps the OP could verify). The sample in MAME is playing as E flat at the moment, whereas the OP's sample is closer to an F.
No.01917 Machone Tester Aug 3, 2008, 18:10 edited on: Aug 3, 2008, 18:11	Sound occurs a few seconds after you get to pick up the 'f' powerup at the start of the first level
No.01918 Tafoid Administrator Aug 3, 2008, 18:12	Ok... adjusting FM down and putting the DAC's up made #48 (1st stage) orch hit much easier to listen to. Confirmed. Thanks!
No.07095 hap Developer Jan 17, 2011, 14:03 edited on: Jan 17, 2011, 14:04	here's the cause: MCFG_CPU_VBLANK_INT_HACK(irq0_line_hold,128) in combination with 57hz refresh rate (probably should be 60) I'll do a more proper implementation of it, after comparing with some cab videos on youtube. (btw, attached file is just the sample from ROM played at 8khz: not actual pcb recording, real pcb is a bit less than 8khz i think)