Hi Fons! On 11/16/2022 2:14 PM, Fons Adriaensen wrote:
On Wed, Nov 16, 2022 at 12:51:44PM +0100, Florian Paul Schmidt wrote:2. If you measure this, you will also note amplitude differences between L and R outputs. This is to be expected. Even if the two filters have exact unity gain (and just a phase shift) at each frequency corresponding to an FFT bin, the resulting filter will not be all-pass.
Thanks for this comment. It took me a while to grok what you meant. It's not all-pass because we're in the DFT-World where the FFT-bins are just _samples_ of the real spectrum. So between these samples non-unity gain shows up. One way of measuring this would be to use a much longer FFT to increase the frequency resolution, right? Kind regards, FPS -- https://dfdx.eu _______________________________________________ Linux-audio-dev mailing list -- linux-audio-dev@lists.linuxaudio.org To unsubscribe send an email to linux-audio-dev-le...@lists.linuxaudio.org
