Viewing Issue Advanced Details
ID Category [?] Severity [?] Reproducibility Date Submitted Last Update
08231 Sound Minor Always Feb 23, 2022, 01:31 Jul 8, 2022, 16:11
Tester ICEknight View Status Public Platform MAME (Official Binary)
Assigned To aaron Resolution Fixed OS Windows 10/11 (64-bit)
Status [?] Resolved Driver
Version 0.240 Fixed in Version 0.246 Build 64-bit
Fixed in Git Commit 4384558 Github Pull Request #
Summary MESS-specific 08231: genesis and clones [ejim2u]: Slight differences in YM2612 emulation
Description I've recorded what may be a good test case for the YM2612's "ladder effect", a track from Earthworm Jim 2 which Tommy Tallarico has mentioned was made specifically to exploit said effect (I'm assuming to add to the cringiness of the level where it's used):


Hardware used: Japanese Mega Drive VA1 (note that this may accentuate these effects, in comparison with later hardware revisions)
Steps To Reproduce Load savestate or:
-Start a game
-Pause, then enter A, C, C, A, B, A, B, Left to enter the sound test
-Select the sount test, press A until the track number is 0
-Press C to play the track
Additional Information Sound in the video was amplified by 20dB, since Mega Drive recordings tend to sound pretty faint.
Github Commit
Flags Verified with Original
Regression Version
Affected Sets / Systems genesis and clones [ejim2u]
Attached Files
zip file icon 0.zip (45,958 bytes) Feb 23, 2022, 01:31 Uploaded by ICEknight
Relationships
There are no relationship linked to this issue.
Notes
5
User avatar
No.19838
Haze
Senior Tester
Feb 23, 2022, 12:12
This should be reported to Aaron on his github page
https://github.com/aaronsgiles/ymfm
User avatar
No.19839
ICEknight
Tester
Feb 23, 2022, 16:23
edited on: Feb 23, 2022, 16:31
Thanks, just posted it there too: https://github.com/aaronsgiles/ymfm/issues/28
User avatar
No.19842
Augusto
Tester
Feb 25, 2022, 07:59
Have you compared using Retroarch core genesis plus gx using Nuked YM2612 ?
User avatar
No.19857
ICEknight
Tester
Feb 27, 2022, 21:33
Nope, only testing MAME.
User avatar
No.20361
ICEknight
Tester
Jul 6, 2022, 09:46
This has apparently just been fixed in ymfm by Aaron: https://github.com/aaronsgiles/ymfm/commit/1d02129da46b20069b46fdcbbfa676e10fcc6186