[FFmpeg-user] “Brick wall” high pass filter

Paul B Mahol onemda at gmail.com
Thu Oct 27 15:13:34 EEST 2022

On 10/27/22, Benjamin Houtman <houtmania at gmail.com> wrote:
> Hi all,
> I’m attempting to create a high pass filter that removes all frequencies
> below 50 Hz. I’ve tried acutsub, acrossover, and highpass, but they all
> seem to attenuate rather than remove those tones entirely. I need to do
> these in batch on multiple files so a DAW really isn’t an option. My
> apologies, but I’ve tried multiple commands so I don’t know that i could
> post them all here. Please advise.
> Best,
> Ben

To "remove" _all_ frequencies use on some bands use afftfilt if you want.

> --
> Benjamin Houtman
> Archivist
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