09139: kchamp, karatedo, karatevs: sound channels are unbalanced

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
09139	Sound	Minor	Always	Mar 6, 2025, 02:37	Mar 11, 2025, 00:13

Tester	Augusto	View Status	Public	Platform	MAME (Unofficial Binary)
Assigned To		Resolution	Open	OS	Linux (64-bit)
Status [?]	Acknowledged			Driver	dataeast/kchamp.cpp
Version	0.274	Fixed in Version		Build
		Fixed in Git Commit		Github Pull Request #

Summary	09139: kchamp, karatedo, karatevs: sound channels are unbalanced
Description	Comparing MAME with arcade video capture the sound channels are unbalanced. Sound fx volume player attack and the bull running are much more high in arcade. If changing AY-3-8910A AY2 Channel 0 to 200 % sounds closer to arcade. That also happens in Karate Champ VS version.
Steps To Reproduce
Additional Information
Github Commit

Flags
Regression Version
Affected Sets / Systems	kchamp, karatedo, karatevs

Attached Files

No.23116 hap Developer Mar 6, 2025, 11:20	AFAIK it's more due to unemulated filters, not volume balance.
No.23121 Augusto Tester Mar 9, 2025, 03:18	That arcade use filters ?
No.23126 125scratch Tester Mar 11, 2025, 00:13	A lot of early games use low-pass filters, some of which are emulated by MAME (like Scramble) and some which aren't (like Taito SJ).