08701: msx systems: Homebrew SCC PCM tests don't work correctly

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
08701	Sound	Minor	Always	Jul 6, 2023, 13:05	Jul 11, 2023, 10:58

Tester	hap	View Status	Public	Platform
Assigned To		Resolution	Open	OS
Status [?]	Confirmed			Driver	msx/msx1.cpp
Version	0.256	Fixed in Version		Build
		Fixed in Git Commit		Github Pull Request #

Summary	08701: msx systems: Homebrew SCC PCM tests don't work correctly
Description	Some homebrew scc pcm test test roms don't work correctly. leilak (in msx1_cart swlist) works alright moam, non-public platform game, appears to works ok attached to this report: leila: should play a clip of and it does, but too fast sccplay: should play a clip of but instead is silent square, triangle: should play a clear tone after a delay, but MAME plays a sweeping tone instead It's hard to pinpoint a regression, it's probably either the due to changes to the msx driver, or the z80. It used to work in older MAME versions. The last one I tried was 0.242, after a cam900 k051649 refactor, it's still ok in that version.
Steps To Reproduce
Additional Information	https://www.msx.org/forum/development/msx-development/pcm-player-using-scc I'm pretty sure I tried leila and sccplay on my real msx back in the day, I don't know if I ever tried square/triangle. All of them work ok on openmsx 18.0 too. Update: I tried triangle.rom yesterday on a 50hz (PAL) msx1: low tone -> prints 08b6 -> low triangle wave
Github Commit

Flags
Regression Version
Affected Sets / Systems	msx systems

Attached Files	scc_tests.zip (654,835 bytes) Jul 6, 2023, 13:08 Uploaded by hap

No.21649 Robbbert Senior Tester Jul 11, 2023, 10:58	There's no system given to test with so I used mx10 and mx15. There's a large black border on the left which I'm pretty sure shouldn't be there. The volume is also really low. I had to turn up the speaker volume (in windows) from 22 to 86 in order to hear anything. I can confirm your report, except that in triangle and square, while waiting for the tone to start there's a buzzing noise which is almost as loud. I didn't get any 08b6 message.

No.21649

Robbbert

Senior Tester

Jul 11, 2023, 10:58

There's no system given to test with so I used mx10 and mx15. There's a large black border on the left which I'm pretty sure shouldn't be there.

The volume is also really low. I had to turn up the speaker volume (in windows) from 22 to 86 in order to hear anything.

I can confirm your report, except that in triangle and square, while waiting for the tone to start there's a buzzing noise which is almost as loud. I didn't get any 08b6 message.