Error 0x88781201

Value: -2005396991 | 0x88781201 | 2289570305

What does it mean ?

DMUS_E_ALREADY_EXISTS  
The tool is already contained in the graph. Create a new instance.
Value: 4609 | 0x1201 | 0b0001001000000001

Where does it come from ?

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

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