07540: ckongpt2: Incorrect envelopes for sounds in all crazy kong variants on crazy climber hardware.

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
07540	Sound	Minor	Always	Jan 7, 2020, 20:35	Jan 11, 2020, 02:16

Tester	Zaphod	View Status	Public	Platform	MAME (Official Binary)
Assigned To		Resolution	Open	OS	Windows 10 (64-bit)
Status [?]	Acknowledged			Driver	nichibutsu/cclimber.cpp
Version	0.217	Fixed in Version		Build	64-bit
		Fixed in Git Commit		Github Pull Request #

Summary	07540: ckongpt2: Incorrect envelopes for sounds in all crazy kong variants on crazy climber hardware.
Description	The musical notes decay too quickly in mame, and have for ages. real board video here. in mame the level end tune sounds very different. there is much more sustain between the notes in it on the real hardware, creating a nice reverb imitation that can clearly be heard. Mame clearly goes duh-duh-duh, duh-duh-duh-duh,duh-duh-duh-duh, duh-duh duh duh... while the arcade goes more like duhuhuh, duh-duhuhuh, duh-duhuhuh, duh-duh duh duh. The odd thing is that the very early emulation sounded correct to me, but ever since the psg emulation was "fixed", it's sounded wrong in these games. I'm not sure what the issue is, but you can clearly hear the sound difference in how it sounds versus MAME. And the video agrees with how i remember donkey king sounding when i saw it back in the day as well.
Steps To Reproduce	Play game. beat level 1 or any other level. happens every time.
Additional Information
Github Commit

Flags	Verified with Original
Regression Version
Affected Sets / Systems	ckongpt2

Attached Files

No.17339 Tafoid Administrator Jan 9, 2020, 10:20	There could be (and likely is) missing AY 8910 discrete filtering involved. Setting to acknowledged
No.17347 Zaphod Tester Jan 11, 2020, 02:16	could be, but as i said, the early emulations of the game didn't have the filtering either, and the audio sounded right to me. that's what's puzzling me. i don't see how filtering would extend sustain. strange.