Hello, my question is very simple. I realized a hardware version of the kiss fft for the AEC Speex in the pjsip. It can handle 256 samples per frame while the whole application (and audio driver) actually is working with 160 samples per frame. I'm evaluating 2 options: 1) to keep the 160 samples per frame and use the zero-padding technique to fill the remaining empty frame. Question: does anybody know what's the effect of the zero-padding in the inverse fft? 2) to scale up all the system to handle 256 samples per frame. Question: is the pjmedia suitable for 256 samples per frame instead of 160? I'm using PCMA frames converted to the L16 in order to use the conference bridge. Any support would be appreciated. Thanks, Fabio