I have a fairly simple AWE Designer file containing the following modules: TypeConversion, BufferUp, Delay, Downsampler, AllPassDelay, Adder. When I click the play button in AWE designer, I hear an output. I also hear an output if I redirect the input pin to a null-sink, and use a sine-generator as the input. If I use the "Tools > Process Files..." tool, and process a .wav file consisting of a sine wave at the same frequency I just tested, then the output data (when I read it into MATLAB) is all zeros (not just close to zero; the maximum absolute value is exactly zero). I've tried varying the frequency of the input signal but still get an all-zero output. Why could this be happening? Is this a bug with AWE designer, or something I'm doing wrong?