On Sat, Nov 28, 2020 at 12:41 PM Michael Koch <[email protected]> wrote:
> Am 27.11.2020 um 20:50 schrieb Paul B Mahol: > > On Fri, Nov 27, 2020 at 8:24 PM Michael Koch < > [email protected]> > > wrote: > > > >> Am 27.11.2020 um 19:25 schrieb Paul B Mahol: > >>> On Fri, Nov 27, 2020 at 7:09 PM Michael Koch < > >> [email protected]> > >>> wrote: > >>> > >>>> Hello, > >>>> > >>>> I have a few questions about the asubboost and asupercut filters. > >>>> > >>>> -- In asubboost it's not yet clear how the block diagram of the filter > >>>> looks like. Especially the "decay" and "feedback" options are unclear. > >>>> What's the input of the the delay line? Before or after the low pass > >>>> filter? Where does the feedback go to? Before or after the lowpass > >>>> filter? I have attached a sketch of a possible block diagram, but it's > >>>> only a wild guess. > >>>> > >>> This filter just adds delayed sub frequencies set by cut off frequency > >> back > >>> to output. Decay sets decay of old sub echo in buffer and feedback sets > >> how > >>> much > >>> new sub frequencies are added to the delay buffer. > > I did try to reverse engineer the asubboost filter from its output > signal. Is the attached sketch correct? > It seems the "feedback" parameter is unnecessary because it does exactly > the same thing as "wet". > No, your reasoning is invalid. I do not have time to draw graphs or do consulting for free. > > Michael > > _______________________________________________ > ffmpeg-user mailing list > [email protected] > https://ffmpeg.org/mailman/listinfo/ffmpeg-user > > To unsubscribe, visit link above, or email > [email protected] with subject "unsubscribe". _______________________________________________ ffmpeg-user mailing list [email protected] https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email [email protected] with subject "unsubscribe".
