Custom Audio Effects in Windows Vista Custom Audio Effects in Windows Vista

Signal Processing Requirements

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  Do not use nonlinear processing. It can interfere with other processing algorithms that the system’s application audio graph provides, such as AEC.
  
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  Processing should be nonblocking. In general, the time that is required for processing to run from beginning to end should stay within a well-defined upper bound.
  
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  Support IEEE 32-bit float input and output. The audio engine’s native sAPOs all operate on a float32 data path.
  
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  An sAPO can have one input and one output audio connection.