Error 0x887800A0

Value: -2005401440 | 0x887800A0 | 2289565856

What does it mean ?

DSERR_OTHERAPPHASPRIO  
Another dsound app has focus, preventing this call from succeeding.
Value: 160 | 0x00A0 | 0b0000000010100000

Where does it come from ?

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

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