On Fri, Nov 27, 2020 at 10:40 PM Michael Koch <astroelectro...@t-online.de> wrote:
> Am 27.11.2020 um 20:50 schrieb Paul B Mahol: > > On Fri, Nov 27, 2020 at 8:24 PM Michael Koch < > astroelectro...@t-online.de> > > wrote: > > > >> Am 27.11.2020 um 19:25 schrieb Paul B Mahol: > >>> On Fri, Nov 27, 2020 at 7:09 PM Michael Koch < > >> astroelectro...@t-online.de> > >>> 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. > >> Sorry, I didn't understand it. I think this filter could be explained > >> much better with a block diagram. > >> > >> > >>>> -- Is it correct that the "slope" parameter effectively changes the > >>>> cutoff frequency, but doesn't change the steepness (dB / octave) of > the > >>>> filter? > >>>> > >>> It changes steepness, not cutoff. > >> What's the unit of the "slope" option? > >> > >> > > 1 / octave, can be set as dB unit, eg. -20dB, 0dB or 1 is max value. > > > > Use mentioned mpv command for the reason, as it displays curve. > > The command does not work on my computer. I did download mpv.exe and run > the command line. mpv exits immediately, no output, no error message. > When I run mpv without any options, then a mpv window opens. > Make sure you run it inside power shell or cmd.exe and make sure you tried mpv.com too. > > Michael > > _______________________________________________ > ffmpeg-user mailing list > ffmpeg-user@ffmpeg.org > https://ffmpeg.org/mailman/listinfo/ffmpeg-user > > To unsubscribe, visit link above, or email > ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe". _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".