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This changes the warning to a debug and also updates the comment a bit.
Thanks to eriktorbjorn for checking Loom Mac in an emulator.
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Skip music resources that don't have the "so" (song?) tag. It is
better than asserting, now that it turns out that they do exist.
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After listening to the original music in a Mac emulator (which
unfortunately doesn't handle the music very well), I can only
conclude that note value 1 means the note should continue playing.
At first I thought maybe it was supposed to fade the current note,
or perhaps change its volume, but I can't hear any traces of
either. So I'm going to assume it just means "hold the current
note", though for the life of me I cannot think of any valid
reason for such a command. So it may be wrong, but it sounds
closer to the emulator than it did before.
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Properly treat rests as rests, not notes. Otherwise, it would try
to play a really low note which just came out as a "pop".
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In looped music, prevent the music channels from drifting out of
sync over time. This was noticeable after a few minutes in the
SCUMM Bar. We do this by extending the last note (which is just
zeroes, so we didn't even use to play it) so that it has the
exact number of samples needed to make all channels the exact
same length. (This is calculated when the music is loaded, so it
does not need any extra data in the save games, thankfully.)
As a result, the getNextNote() is now responsible for converting
the duration to number of samples (out of necessity) and for
converting the note to a pitch modifier (out of symmetry). I made
several false starts before I realized how much easier it would
be this way.
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Try the Mac OS Roman form, the UTF-8 form and the filename without
any trademark glyph.
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The Monkey Island and Loom mac music is really quite similar. The
data layout is a bit different, but most of the code was easy to
separate into its own class. The Loom player doesn't do looped music
but I don't remember off-hand if it ever should.
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It turns out that playing the Mac Loom music isn't particularly
different from playing the Monkey Island 1 music, except the data
layout is a bit different and there's no per-note volume.
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