Error 0x88781131

Value: -2005397199 | 0x88781131 | 2289570097

What does it mean ?

DMUS_E_SYNTHNOTCONFIGURED  
The operation could not be completed because the software synthesizer has not yet been fully configured.
Value: 4401 | 0x1131 | 0b0001000100110001

Where does it come from ?

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

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