[Scummvm-tracker] [ScummVM :: Bugs] #17387: SCUMM: Music not quite working in PowerPC Mac version

[ScummVM :: Bugs]

#17387: SCUMM: Music not quite working in PowerPC Mac version
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Reporter:  eriktorbjorn     |      Owner:  (none)
    Type:  defect           |     Status:  new
Priority:  normal           |  Component:  Engine: SCUMM
 Version:                   |   Keywords:
    Game:  Indiana Jones 4  |
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 English PowerPC version from the LucasArts Macintosh Archives Vol. 1.

 When starting the game, one note of the Indy fanfare isn't played. Trying
 to debug, it seems that `NewMacSoundSystem::allocateChannel()` fails to
 allocate a channel for it. Perhaps they are saturated by the initial drum
 roll, or something like that.

 I can't believe this would have gone unnoticed at LucasArts, so it's
 probably a ScummVM bug. And it probable stems from the fact that I tried
 to improve ScummVM support for the PowerPC version by sheer guesswork. At
 the time, I did not even own a copy of the game, which made things tricky.

 The `IMuseDriver_Macintosh` constructor is supposed to create the
 appropriate sound device, and set some appropriate parameters. There is
 `DJMSoundSystem` for the Eric Johnston Mac Ports, and `NewMacSoundSystem`
 for the Aaron Giles ones. There are only three games that use
 `NewMacSoundSystem`: Day of the Tentacle, Sam & Max, and Fate of Atlantis.
 Fate of Atlantis was the only game that was ported by both of them.

 The device is further configured by setting a couple of parameters,
 including a version number. Sam & Max uses version 2, everything else
 currently uses version 1.

 Judging by the time stamps on my CDs, Sam & Max and Day of the Tentacle
 were made around the same time, with Fate of Atlantis arriving a few
 months later. So does the version number reflect chronology, or is Sam &
 Max different because it uses a different version of iMUSE itself?

 As an experiment, I tried changing Fate of Atlantis to use version 2, but
 that made things worse.
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Ticket URL: <https://bugs.scummvm.org/ticket/17387>
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