Error 0x8AC70015

Value: -1966669803 | 0x8AC70015 | 2328297493

What does it mean ?

XACTENGINE_E_MULTIPLEAUDITIONENGINES  
Attempted to create more that one audition engine.
Value: 21 | 0x0015 | 0b0000000000010101

Where does it come from ?

FACILITY_XACTENGINE  
Microsoft Cross-Platform Audio Creation Tool (XACT)
Value: 2759 | 0xAC7 | 0b101011000111

Other Errors for FACILITY_XACTENGINE