Open arily opened 3 weeks ago
Hi, I have noticed that the upmixed result contains aliasing noises.
Here's the original stereo audio (44.1khz oversampled to 88.2 to demonstrate)
matrix result: (4.0 quad)
as you can see both above f/2 and below is not as clean as the original signal.
I noticed adjusting fft window size changes the color of the aliases.
I also tried using f64 and lower amplitude to leave headrooms, prevent clipping, but these methods only reduces the noise, not eliminating it.
Hi, I have noticed that the upmixed result contains aliasing noises.
Here's the original stereo audio (44.1khz oversampled to 88.2 to demonstrate)
matrix result: (4.0 quad)
as you can see both above f/2 and below is not as clean as the original signal.
I noticed adjusting fft window size changes the color of the aliases.
I also tried using f64 and lower amplitude to leave headrooms, prevent clipping, but these methods only reduces the noise, not eliminating it.