Error 0x88781139

Value: -2005397191 | 0x88781139 | 2289570105

What does it mean ?

DMUS_E_DSOUND_NOT_SET  
The port could not be created because no DirectSound instance has been specified. Specify a DirectSound interface via the IDirectMusic::SetDirectSound method; pass NULL to have DirectMusic manage usage of DirectSound.
Value: 4409 | 0x1139 | 0b0001000100111001

Where does it come from ?

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

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