Error 0x8878113A

Value: -2005397190 | 0x8878113A | 2289570106

What does it mean ?

DMUS_E_ALREADY_ACTIVATED  
The operation cannot be carried out while the port is active.
Value: 4410 | 0x113A | 0b0001000100111010

Where does it come from ?

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

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