Frequency detection on Android - AudioRecord
问题 This is my second question because i hawe a problem. I've to implement a simple Frequency detection on Android. For the DFT i've found the jTransform library (https://sites.google.com/site/piotrwendykier/software/jtransforms). In the API of jTransform http://incanter.org/docs/parallelcolt/api/edu/emory/mathcs/jtransforms/fft/DoubleFFT_1D.html#complexForward%28double%5B%5D%29 i had seen that i've to pass a double vector at the complexForward() method, and obliviously not a File. So, for first,