I have a question about the low-cut and high-cut filter on an equalizer. Let's say, for example, that I'm using a 15 band equalizer with the following central frequencies: 25, 40, 63, 100, 160, 250, 400, 630, 1000, 1600, 2500, 4000, 6300, 10000, 16000.
I read that the first and last bands (25 and 16000 Hz) are low-cut and high-cut filters with -3db at the cut-off value and a slope with -20db per decade.
But, how does it works ?
The low/high cut frequencies are 25 and 16000 Hz and for those extreme bands, there is no manual setting : it is automatically set at -3db for the cut-off frequency with a -20db slope per decade.
The low/high cut frequencies are at 25 and 16000 Hz and have a "pre-effect" of -3db at the cut-off frequency and a slope at -20db per decade. The user can manually set the cursor, but it means there is a "gap" of -3db between the manual set and the real effet : at 0, there is -3db or correction, at +3, it is 0db, at -3, it is -6db...
The low/high cut frequencies are at 25 and 16000 Hz and should be set at -3db but, as the user can manually set the value, it is finally the value set by the user which is applyed at the cut-off frequency with the same -20db per decade slope.
Those extrement 25 and 16000 Hz bands are not the low/high cut frequencies but "normal" bands. The low/high cut frequencies are at other values. But, in this case, what are those values for the cut-off frequencies ?
- Another solution
Please, could you tell me if the way it works is the 1, 2, 3 or 4 ? And if it is another solution, could you explain it to me ?