[Scummvm-tracker] [ScummVM :: Bugs] #10927: SCI: KQ6 - MIDI playback broken by interrupting a scene

[ScummVM :: Bugs]

#10927: SCI: KQ6 - MIDI playback broken by interrupting a scene
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Reporter:  raziel-  |      Owner:  (none)
    Type:  defect   |     Status:  new
Priority:  normal   |  Component:  Audio
Keywords:  MIDI     |       Game:  King's Quest 6
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 ScummVM 2.1.0git (Mar 29 2019 07:32:32)
 Features compiled in: Vorbis FLAC MP3 RGB zLib MPEG2 Theora AAC FreeType2
 JPEG PNG cloud (servers, local)

 There is a bug in the MIDI handling when one breaks certain animations
 where MIDI is playing, but the player
 should *not* have access or the means to break the scene. (At least not in
 the original interpreter)

 Load the attached save state (Standing on the beach on the Isle of the
 Beast)
 - Use the magic map
 - Choose the Isle of Mist and let the druids drag you to their bonfire
 Once in the cage with the animation and MIDI music playing, press CTRL+F5
 and load any other save

 From this point on, all MIDI music will be broken in a way that notes from
 the interrupted Druids music (and
 even some parts of the speech, but only as long as they are finished) will
 play along parallel to the actual (new) scene music.
 Because of it's bugged nature, those interrupted notes play completely
 wrong. They screech and scream
 on playback and are generally sounding far off to the original, as if they
 were played with wrong or broken
 playback information. (Probably playing with the information of the actual
 scene MIDI and as such wrong)

 Most notably in the scene where the Book and Pawnshop is (just go there to
 see what it sounds like)

 Another problem is, but that may be my hardware, that these interrupted
 notes are *not* erased or rectified
 by any means other than closing down ScummVM completely.
 Respectively the MIDI hardware seems to be not informed on scene changes
 (or so it looks like), load of other save games or even closing down the
 game and restarting it from launcher.

 One *has* to at least shut down ScummVM and restart it to get rid of it.
 (A reboot of the MIDI hardware -while ScummVM still runs- does also not
 help, but this again may be my hardware as i´m using an USB adapter and
 that one still displays the -wrong- notes playing through it´s LED)

 If more information or tests are necessary, please let me know.

 King's Quest VI: Heir Today, Gone Tomorrow (CD/Windows/English)
 (but more games could be affected)

 AmigaOS4 - SDL - PPC - BE
 gcc (adtools build 8.3.0) 8.3.0
 Yamaha MU90 with an Edirol USB Midi adapter

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Ticket URL: <https://bugs.scummvm.org/ticket/10927>
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