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ID Category [?] Severity [?] Reproducibility Date Submitted Last Update
08662 Sound Minor Always Jun 13, 2023, 15:01 Jun 24, 2023, 18:47
Tester -MAME Source- View Status Public Platform
Assigned To Resolution Fixed OS
Status [?] Resolved Driver
Version 0.255 Fixed in Version 0.256 Build
Fixed in Git Commit aabf358 Github Pull Request # #11367
Summary 08662: banbam, pettanp: Balance between 2 PSG chips is incorrect
Description MAME lists the balance as "0.75" and "0.75" in the source code.

According to the OST ( Disc 7), the relation should be m_sn[0] = 0.2 and m_sn[1] = 1.0 (edited)
(I measured this using Audacity by looking how large the jump between the "high" and "low" states of the square waves are at the point where only 1 channel is active on each SN chip at the beginning of the posted song.)

There is also a recording of the real machine on YouTube

You will notice that the "fill-in" just before the end of the uploaded MP3s above is almost inaudible in the MAME version, but very clear in the "fixed" one. It is also easy to hear in the video at 0:28.
Steps To Reproduce
Additional Information Posted by ValleyBell via Discord
Github Commit
Regression Version
Affected Sets / Systems banbam, pettanp
Attached Files
mp3 file icon pettanp_StartJingle_MAME.mp3 (232,752 bytes) Jun 13, 2023, 15:01 Uploaded by Tafoid
MAME current Start Jingle
mp3 file icon pettanp_StartJingle_fixedVGM.mp3 (229,320 bytes) Jun 13, 2023, 15:02 Uploaded by Tafoid
"Fixed" BGM Start Jingle
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