Error 0x88970001

Value: -2003369983 | 0x88970001 | 2291597313

What does it mean ?

XAPO_E_FORMAT_UNSUPPORTED  
This XAPO does not support the requested audio format.
Value: 1 | 0x0001 | 0b0000000000000001

Where does it come from ?

FACILITY_XAPO  
Cross-platform Audio Processing Object --a thin wrapper that manages DSP code, allowing it to be easily plugged into an XAudio2 effect chain
Value: 2199 | 0x897 | 0b100010010111

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Other Errors for FACILITY_XAPO