Error 0x8004504A

Value: -2147200950 | 0x8004504A | 2147766346

What does it mean ?

Methods associated with active audio stream cannot be called unless stream is active.
Value: 20554 | 0x504A | 0b0101000001001010

Where does it come from ?

COM/OLE Interface management. FACILITY_ITF is designated for user-defined error codes returned from interface methods
Value: 4 | 0x004 | 0b00000100

Other Errors for FACILITY_ITF