func prepareWindowFunctions(frameLen int) [][]float64 {
windowFunctions := make([][]float64, 4)
windowFunctions[0] = window.CreateHanning(frameLen)
windowFunctions[1] = window.CreateHamming(frameLen)
windowFunctions[2] = window.CreateBlackman(frameLen)
windowFunctions[3] = window.CreateGaussian(frameLen, 0.4)
return windowFunctions
}
// New returns a new STFT instance.
func New(frameShift, frameLen int) *STFT {
s := &STFT{
FrameShift: frameShift,
FrameLen: frameLen,
Window: window.CreateHanning(frameLen),
}
return s
}