the waveform that looks clipped on the bottom, you’ll probably see that it’s not actually clipped (the peaks just all line up)
I’m not shocked. That exactly what happens if the performance actually overloads, except it happens to both positive an negative peaks. Most important the Soft Limiter smooshes (technical term) the peaks in such a way that they sound fine.
The mention of “brick wall” is from limiter.ny
I believe you. This is me, not a programmer.
the “highpass4” function
I can believe that. If somebody forced me to describe the damage, I’d say the 0Hz to 2Hz “DC level” was wandering giving the apparent effect of overall waveform rising and falling.
Both Butterworth and Chebyshev are messy, just in different ways.
That rolloff has a history. It’s a close cousin to the rumble filter seen on sound mixers and in particular field mixers for exterior movie sound tracks. It’s a terrific compromise but you can still fake it out. If you have an announcing voice that goes down that low, “NBC Radio News on the Hour,” that might not be the filter for you.
This is the text version of the equalization effect. I think the name was the only thing that ever changed. It was designed as LF Rolloff… and got changed into Low Rolloff… for its debut.
Here’s a thing I wrote on the sister posting.
Koz