| ID | Category [?] | Severity [?] | Reproducibility | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 06460 | Sound | Minor | Always | Dec 24, 2016, 00:59 | Jan 22, 2017, 04:27 |
| Tester | M.A.S.H. | View Status | Public | Platform | MAME (Self-compiled) |
| Assigned To | system11 | Resolution | Fixed | OS | |
| Status [?] | Resolved | Driver | |||
| Version | 0.180 | Fixed in Version | 0.182 | Build | Normal |
| Fixed in Git Commit | Github Pull Request # | ||||
| Summary | 06460: stlforce: OKI6295 speed is too slow | ||||
| Description |
The music/sound speed of the OKI6295 in Steel Force is too slow. I found an arcade video of the game and compare the music at time=1:08s with the one in MAME. The OKI6295 speed in MAME is 937500 Hz, that's the board cyrstal divided by 16 (15Mhz / 16 = 937500 Hz) A factor of 14 is exactly the speed in the video. Changed line 213 in drivers\stlforce.cpp from MCFG_OKIM6295_ADD("oki", 937500 , OKIM6295_PIN7_HIGH) to MCFG_OKIM6295_ADD("oki", XTAL_15MHz/14, OKIM6295_PIN7_HIGH) and check it! |
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| Steps To Reproduce | |||||
| Additional Information |
Steel Force arcade attract mode Watch t=1:08 |
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| Github Commit | |||||
| Flags | Verified with Original | ||||
| Regression Version | |||||
| Affected Sets / Systems | stlforce | ||||
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Attached Files
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 stlforce_MAME0180.mp3 (214,272 bytes) Dec 24, 2016, 00:59 Uploaded by M.A.S.H. | ||||
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stlforce_Youtube-Video.mp3 (214,412 bytes) Dec 24, 2016, 01:01 Uploaded by M.A.S.H. | |||||
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stlforce_XTAL_15MHz-14.mp3 (214,272 bytes) Dec 24, 2016, 01:01 Uploaded by M.A.S.H. | |||||
 No.13517
Tafoid Administrator
Dec 29, 2016, 14:15
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I can confirm the speed/tempo of the music in MAME does seem slower than recording. The fix suggested may or may not be valid. |
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 No.13520
Haze Senior Tester
Dec 29, 2016, 16:53
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A divider of 14 is a bit unusual, I believe system11 might be picking up something running on this hardware at some point tho, and would probably be able to verify then.. |
 No.13536
system11 Senior Tester
Jan 12, 2017, 23:58
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I have this actual PCB, just fished it out and will measure the OKI. What does it sound like if you go with 32/32? There's a 32MHz on there too of course. |
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No.13537
AJR Developer
Jan 13, 2017, 02:40
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Setting the clock to XTAL_15MHz/14 doesn't make the pitch match the reference either. |
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No.13544
system11 Senior Tester
Jan 21, 2017, 19:10
edited on: Jan 21, 2017, 19:54
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Confirmed, as expected it's 32/32, measures 1Mhz at the chip. https://github.com/mamedev/mame/pull/2006 |
 No.13545
cuavas Administrator
Jan 22, 2017, 04:27
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You can't mark as resolved if nothing is in mainline |