07773: kot: sound is corrupted

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
07773	Sound	Minor	Always	Oct 20, 2020, 18:25	Apr 4, 2021, 19:39

Tester	Osso	View Status	Public	Platform	MAME (Official Binary)
Assigned To	hap	Resolution	Fixed	OS	Windows 10 (64-bit)
Status [?]	Resolved			Driver	ussr/tiamc1.cpp
Version	0.225	Fixed in Version	0.231	Build	64-bit
		Fixed in Git Commit	17c64fa	Github Pull Request #

Summary	07773: kot: sound is corrupted
Description	Just after launch a continuous whining noise is played.
Steps To Reproduce	Just launch the romset
Additional Information	First reported by M.A.S.H. on Github. https://github.com/mamedev/mame/commit/009a5d3d07224a1de30931d1cf89de06d1f23598#commitcomment-43389999
Github Commit

Flags
Regression Version	0.225
Affected Sets / Systems	kot

Attached Files

No.18072 Tafoid Administrator Oct 20, 2020, 19:03	Specifically, This commit seems to be the cause in my daily binary checking, September 14, 2020: https://github.com/mamedev/mame/commit/c1bd56f0d318c71faac757d89c910c2682af6651
No.18074 hap Developer Oct 22, 2020, 10:01	kot uses SPEAKER_SOUND (sound/spkrdev.*) Possibly related: lchicken (hh_cop400 driver, also uses SPEAKER_SOUND) has a high pitched whine too, as if the filtering isn't working correctly anymore.
No.18076 aaron Developer Oct 23, 2020, 17:19	I'm looking into this, the speaker device seems to have some subtle timing dependencies that got off by a bit with the update.