06000: breakout: [possible] sound output pitch different from real PCB

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
06000	Sound	Minor	Always	Jul 27, 2015, 21:46	Dec 5, 2020, 10:15

Tester	kazblox	View Status	Public	Platform	MAME (Official Binary)
Assigned To	couriersud	Resolution	Open	OS	Windows Vista/7/8 (64-bit)
Status [?]	Assigned			Driver	atari/pong.cpp
Version	0.163	Fixed in Version		Build	Normal
		Fixed in Git Commit		Github Pull Request #

Summary	06000: breakout: [possible] sound output pitch different from real PCB
Description	If you compare the output of the TTL sound output from Breakout's emulation in MAME, and a real PCB, you can notice that the pitch in the emulation is one octave higher (if you hear very closely)
Steps To Reproduce
Additional Information
Github Commit

Flags	Possible
Regression Version
Affected Sets / Systems	breakout

Attached Files

No.11901 NekoEd Senior Tester Jul 28, 2015, 00:31	I'm wondering if it's not a tolerance/component aging issue; remember MAME's components have perfect tolerance and never go off spec. This might not be a bug, so I'm going to mark it for input from devs.
No.11903 haynor666 Tester Jul 28, 2015, 09:30	Net list is still in dev. so just like m62 games sound issue can happens.
No.11923 kazblox Tester Aug 1, 2015, 06:32	Overclocking the CPU to 96% seems to bring it around the correct pitch
No.16355 couriersud Developer Apr 22, 2019, 12:27	This is not an ageing issue. MAME emulation is based on "REV F" schematics. The sounds are all generated digitally by 9316 counters B7 (11,12) and B8 (14). Other outputs are not used so a mod is relatively easy. B7.12 = 2 x B7.11 = 4 x B8.14 So all sounds are an octave apart. Connecting sounds to B7.11, B8.14 and B8.13 would make sounds one octave lower. Anybody interested can relatively easy do the mod in nl_breakout.cpp #define BRICK_SOUND "B8", 14 #define P_HIT_SOUND "B7", 12 #define VB_HIT_SOUND "B7", 11 Just change the pin numbers. Unfortunately, without a board revision or hires PCB pictures from the machine the video has been taken from (both front and back) this is all pure speculation.
No.16776 MetalGod Senior Tester Aug 20, 2019, 11:18	Some more pcb videos, in case they serve:
No.16821 MetalGod Senior Tester Aug 30, 2019, 11:00 edited on: Aug 30, 2019, 11:00	Couriersud, I have located a breakout original cabinet, please tell me, what do you exactly need ???
No.18217 MetalGod Senior Tester Dec 5, 2020, 10:15 edited on: Dec 5, 2020, 12:28	series of 4 videos showing breakout pcb very closely and offering tons of information about it.