Synopsis
		sfstft < in.rsf > out.rsf inv=n window=n sym=n opt=y ntw=7

Parameters
		bool inv=n [y/n] if y, perform inverse transform   int ntw=7 time-window length   bool opt=y [y/n] if y, determine optimal size for efficiency   bool sym=n [y/n] if y, apply symmetric scaling to make the FFT operator Hermitian   bool window=n [y/n] if y, add Hanning window