Lets assume a pipeline
in_buffer1 * window -> fft -> car_to_pol -> pol_to_car -> ifft -> out_buffer1 / \ in_signal out_buffer1 + out_buffer2 -> out_signal \ / in_buffer2 * window -> fft -> car_to_pol -> pol_to_car -> ifft -> out_buffer2
in_buffer2 overlap in time by exactly 50% and the
window is i.e. a hamming window with an offset matching the buffer.
out_signal should be just a reconstructed
in_signal with a delay depending of the buffers lengths with no frequency leaks.
However lets then consider a following pipeline
Y for a single buffer with two sifnal sources and one result
in_signalA(n) -> in_bufferA(n) * window -> fftA(n) -> car_to_polA(n) -> imgA(n) -> pol_to_car -> ifft -> out_buffer(n) \ / realB(n) * realA(n) / in_signalB(n) -> in_bufferB(n) * window -> fftB(n) -> car_to_polB(n)
Then apply the same overlapping oerlapping as per the pipeline
X where the
n is the number of the pipeline, i.e. 0 - no offset, 1- 50% offset,
This should produce a 'vocoder' effect.
However I do get cracks on the output signals which suggest there is a frequency leak I'm not compensating for. Any idea what I'm missing here?