MWW
MWW is the non-documented, proprietary binary file format developed by Middle Earth Software that stored MIDI and additional information. The .mww files are typically about six to eight times larger than .mid files. MusicWorks has an autosave feature that created a "~MW" file, identical to an MWW file, that backs up the music while being working on. The program is stable enough that this is in case the OS crashes or some other problem is caused by multi-tasking.
Until late 2015 MusicWorks featured an interesting bug from a combination of OS obsolescence and their proprietary format. Since MusicWorks could only run in the 9x kernel, and .mww was limited to Music Works, music saved as .mww can neither be played, as there are no .mww players, nor converted to .mid, as Music Works only ran in the 9x kernel. The result was thousands of silent, unplayable music files. MusicWorks now runs on all modern Windows versions.
MIDI is a technical standard that describes a communication protocol, digital interface, and electrical connectors that connect a wide variety of electronic musical instruments, computers, and related audio devices for playing, editing, and recording music.
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Finale is a proprietary music notation software developed and released by MakeMusic for Microsoft Windows and macOS since 1988.
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