[ scummvm-Patches-2827392 ] Using more than one FM_OPL object (experimental)

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Patches item #2827392, was opened at 2009-07-26 18:51
Message generated for change (Tracker Item Submitted) made by eriktorbjorn
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Category: None
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Torbjörn Andersson (eriktorbjorn)
Assigned to: Nobody/Anonymous (nobody)
Summary: Using more than one FM_OPL object (experimental)

Initial Comment:
This patch started out as an attempt to fix bug #2545447 ("MI2: Waterfall sound breaks up") by using two FM_OPL objects instead of one. In other words, it simulates having two AdLib sound cards cooperating to play the music. However, it turns out that it doesn't fix the bug, it just postpones it a bit. It also turned out that the patch only works with MAME's emulator, not DOSBox's. That's when I decided not to finish the patch, so right now you have to set the _numCards variable to either 1 or 2 and then recompile.

On the other hand, it does keep the music from cutting out during the Fate of Atlantis endgame, so I didn't want to throw it away either. But maybe there's a simpler way to achieve the same thing? DOSBox's emulator has some references to OPL3, and I guess using that would double the number of channels too. (OPL3 has some other features too, but I don't know if any of the games that ScummVM supports know how to take advantage of that.)

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You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=418822&aid=2827392&group_id=37116