Error 0x88781111

Value: -2005397231 | 0x88781111 | 2289570065

What does it mean ?

DMUS_E_ALREADY_LOADED  
Attempted to load a DLS collection that has already been loaded.
Value: 4369 | 0x1111 | 0b0001000100010001

Where does it come from ?

FACILITY_DIRECTMUSIC  
Direct Music (part of DirectX) - Audio
Value: 2168 | 0x878 | 0b100001111000

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