Roland MT-32 Owner's Manual page 26

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SINGLE ASSIGN
This function causes the MT-32 to stop playing a note, then restart
on the same note when it receives note-on data that has the same
note number as the current one,
MULTIPLE ASSIGN
This function causes the MT-32 to switch to another voice and
continue playing a note when it receives note-on data that has the
same note number as the current one.
PRIORITY TO LAST DATA [First in, First out]
Hf the new note-on messages exceed the number of notes played
simultaneously, the MT-32 will stop playing notes one after
another in the order in which it started playing them.
PRIORITY TO FIRST DATA [First in, Last out]
If the new note-on messages exceed the number of notes played
simultaneously, the MT-32 will stop playing notes one after
another in the order opposite to that in which it started playing
them.
3) WRITING USER PATCHES TO MEMORY
The MT-32 allows a System Exclusive patch to replace any of the
128 built-in patches.